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Full text of "IAPMO UPC (2009): Uniform Plumbing Code"

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NOTICE OF INCORPORATION 

United States Legal Document 

$3T All citizens and residents are hereby advised that 

this is a legally binding document duly incorporated by 

reference and that failure to comply with such 

requirements as hereby detailed within may subject you 

to criminal or civil penalties under the law. Ignorance of 

the law shall not excuse noncompliance and it is the 

responsibility of the citizens to inform themselves as to 

the laws that are enacted in the United States of America 

and in the states and cities contained therein. ~^k 

* * 
* 

IAPMO UPC (2009) , the Uniform Plumbing Code, 
as adopted and incorporated by the States and 
Municipalities, including Montana, New Mexico, 
North Dakota, et . alia. 



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An American National Standard 

IAPMO/ANSI UPC 1-2009 



2009 
UNIFORM 
PLUMBING 
CODE 



IAPMO 




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ANSI 



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UNION . 



N ^^^ _^^^ Mechanical Contractors Associaiion 

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Greenpiumbers® 

CREATING SUSTAir-JABi_E COMMUNITIES 





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WORLD PLUMBING 
.COUNCIL 



Member 



REVISION MARKINGS 

Code changes from the 2006 edition are marked in the margins as follows: 
— ► An arrow denotes a deletion. 
I A vertical denotes a change. 
tba TIA indicates that the revision is the result of a Tentative Interim Amendment 

TiA 

TBA For further information on tentative interim amendments see Section 5 of the IAPMO 
tia Regulations Governing Committee Projects available at http://www.iapmo.org/pages/ 
tia coded evelopmentprocedures.aspx 



NFPA 
NFPA 
NFPA 
NFPA 
NFPA 
NFPA 
NFPA 
NFPA 



A reference in brackets [ ] following a section or paragraph indicates material that has 
been extracted from another document. This reprinted material is not the complete and 
official position of the National Fire Protection Association on the reference subject which 
is represented by the standard in its entirety. Text which has been extracted pursuant to 

Jj™ IAPMO's Extract Guidelines is denoted with the use of "NFPA" in the margin. This text 
has not been fully processed by IAPMO in accordance with ANSI's public announcement 
consensus requirements for an American National Standard (ANS) nor approved by 

nfpa ANSI's Board of Standards Review, but will be fully processed in accordance with those 

N ^£ requirements as part of the next revision cycle for this* document. 



NFPA 
NFPA 
NFPA 
NFPA 
NFPA 



Information on referenced publications can be found in Chapter 14. 

All pressures used in this code are gauge pressures unless otherwise indicated. 

Copyright © 2009 

by 

International Association of Plumbing and Mechanical Officials 

All Rights Reserved 

No part of this work may be reproduced or recorded in any form or by any means, 
except as may be expressly permitted in writing by the publisher. 

Twenty-Fifth Edition 

First Printing, January 2009 

Second Printing, April 2009 
Third Printing, November 2009 
Fourth Printing, February 2010 

Fifth Printing, October 2010 

ISSN 0733-2335 

Published by the International Association of Plumbing and Mechanical Officials 

5001 E. Philadelphia Street • Ontario, CA 91761-2816 - USA 

Main Phone: (909) 472-4100 • Main Fax: (909) 472-4150 



& 



PAINTED WITH 

SOY INK 



2009 UPC Foreword 

The advantages of a uniform plumbing code adopted by various local jurisdictions has long been recognized. 
Disorder in the industry as a result of widely divergent plumbing practices and the use of many different, 
often conflicting, plumbing codes by local jurisdictions influenced the Western Plumbing Officials Association 
(now the International Association of Plumbing and Mechanical Officials [IAPMO]) to form a committee of 
plumbing inspectors, master and journeyman plumbers, and sanitary and mechanical engineers, assisted by 
public utility companies and the plumbing industry to create a basic plumbing document for general use. The 
product of this effort, the first edition of the Uniform Plumbing Code™ (UPC™) was officially adopted by 
IAPMO in 1945. The widespread use of this code over the past five decades by jurisdictions throughout the 
United States and internationally is testament to its merit. 

With the publication of the 2003 Edition of the Uniform Plumbing Code, another significant milestone was 
reached. For the first time in the history of the United States, a plumbing code was developed through a true 
consensus process. The 2009 edition represents the most current approaches in the plumbing field and is the 
third edition developed under the ANSI consensus process. Contributions to the content of the code were 
made by every segment of the built industry, including such diverse interests as consumers, enforcing 
authorities, installers /maintainers, labor, manufacturers, research /standards /testing laboratories, special 
experts, and users. 

The UPC is designed to provide consumers with safe and sanitary plumbing systems while, at the same time, 
allowing latitude for innovation and new technologies. The public at large is encouraged and invited to 
participate in IAPMO's open consensus code development process. This code is updated every three years. A 
code development timeline and other relevant information is available at IAPMO's website at 
www.iapmo.org. 

The Uniform Plumbing Code is dedicated to all those who, in working to achieve "the ultimate plumbing code/' 
have unselfishly devoted their time, effort, and personal funds to create and maintain this, the finest plumbing 
code in existence today. 

The 2009 Uniform Plumbing Code is supported by the American Society of Sanitary Engineering (ASSE), the 
Mechanical Contractors Association of America (MCAA), the Plumbing-Heating-Cooling Contractors National 
Association (PHCC-NA), the United Association (UA), and the World Plumbing Council (WPC). The presence 
of these logos, while reflecting support, does not imply any ownership of the copyright to the UPC, which is 
held exclusively by IAPMO. Further, the logos of these associations indicates the support of IAPMO's open, 
consensus process being used to develop IAPMO's codes and standards. 

The addresses of the organizations are as follows: 

ASSE - 901 Canterbury Road, Suite A • Westlake, OH 44145-7201 • (440) 835-3040 

Green Plumbers - 4153 Northgate Blvd, Suite 1 • Sacramento, CA 95834 • (888) 929-6207 

MCAA - 1385 Piccard Drive • Rockville, MD 20850 • (301) 869-5800 

PHCC-NA - PO Box 6808 • Falls Church, VA 22046 * (800) 533-7694 

UA - 901 Massachusetts Avenue NW • Washington, DC 20001 • (202) 628-5823 

WPC - WPC Secretary • c/o Mechanical Contractors Association of Alberta 

#204 272542 St. NE Calgary • Alberta T2E 7J2, Canada • +1-40-325-072-37 

P. O. Box 2005 • Marmion, Western Australia 6020 • +61-8-9448-0430 



Tentative Interim Amendment (TIA) 

A Tentative Interim Amendment (TIA) to any Document may be processed if the Council Secretary 
determines/ after a preliminary review, and consultation with the appropriate Chair, that the Amendment 
appears to be of an emergency nature requiring prompt action and has the endorsement of a Member of the 
involved Technical Committee. 



Section 21 1 .0 Insanitary - This Tentative Interim Amendment (TIA) was issued on January 23, 2009. 
Section 405.2 Prohibited Urinals - This Tentative Interim Amendment (TIA) was issued on January 23, 2009. 



For further information on Tentative Interim Amendments, see Section 5 of the IAPMO Rules Governing 
Committee Projects - www.iapmo.org. 



VI 



COMMITTEE ON UNIFORM PLUMBING CODE 

These lists represent the membership at the time the Committee was balloted on the final text of this edition. Since that time, changes in the membership may have 
occurred. 

IAPMO Standards Council 

J. Richard Wagner, Chairman 

The Poole & Kent Company, [SE] 

Kevin Cotter, UA Local 12 [L] Ron George, Ron George Design & Consulting Services [SE] 

Bob Courtnier, State of California f U] Dave Levanger, Carbon County, Utah [E] 

Jim Crawford, City of Vancouver [U] Phil Ribbs, PHR Consultants [SE] 

John Garvelink, Commercial Design Engineering Ltd. [I /M] Terry Swisher, State of Oregon [E] 

Nonvoting 

Gabriella M. Davis, Secretary Lynne Simnick, Recording Secretary 

International Association of Plumbing and Mechanical Officials International Association of Plumbing and Mechanical Officials 

IAPMO Uniform Plumbing Code Technical Committee 

Tim Collings, Chairman 

Salt Lake City, Utah, [E] 

Rand Ackroyd, Rand Engineering [Mj Scott Hamilton, United Association [L] 

Rep. Plumbing and Drainage Institute Theodore Lemoff, NFPA International [R/S/T] 

Bob Adler, City of San Jose, California [E] William LeVan, Cast Iron Soil Pipe Institute [M] 

Julius Balianco, J B Engineering /Code Consultant PC [SE] Shawn Martin, Plumbing Manufacturers Institute [M] 

Rep. American Society of Plumbing Engineers Nasser Nikravi, State of California, OSHPD [E] 

Sylvanus Bloice, Roots Plumbing Services [I/M] Thomas Pape, Alliance for' Water Efficiency [C] 

Tim Brink, Mechanical Contractors Association of America [I/M] Arnold Rodio, Pace Setter Plumbing [I/M] 

Jeremy Brown, NSF International [R/S/T] Anthony Scarano, Plastics Piping Consultant [SE] 

Lawrence Brown, National Association of Home Builders [U] Larry Soskin, Ace Duraflo [I/M] 

Percy Brown, Maine Plumbers Examining Board [E] Jim Stack, Plumbing-Heating-Cooling Contractors National 
Paul Cabot, American Gas Association [U] Association [I /M] 

Ian Chang, lntertek Testing Services [R/S/T] Joseph Sternola, National Propane Gas Association (NPGA) [U] 

Richard Church, Plastic Pipe and Fittings Association [M] Amir Tabakh, City of Los Angeles [E] 

Rickey Fabra, Plumbers & Steamfitters Local [L] John Taecker, Underwriters Laboratories [R/S/T] 

John Fischer, County of St. Louis [E] April Trafton, Donald Dickerson Associates [SE] 

Alternates 

Michael Cudahy, Plastic Pipe and Fittings Association [M] Ray Moore, American Society of Plumbing Engineers [SE] 

James Dingman, Underwriters Laboratories [R/S/T] James Pavesic, United Association [L] 

Richard Emerson, Plumbing Manufacturers Institute [M] Michael Tharpe, City of Los Angeles [E] 

Nasrin Kashefi, NSF International [R/S/T] James Walls, Cast Iron Soil Pipe Institute [M] 

Doug Kirk, Plumbing-Heating-Cooling Contractors National Mike Wynne, Plumbers & Steamfitters Local |L] 
Association [I/M] 

Nonvoting 

Ron Rice, Ex-Officio, IAPMO [E] Lynne Simnick, IAPMO Staff Liaison 

COMMITTEE MEMBERSHIP CLASSIFICATION ABBREVIATIONS 

These classifications apply to Technical Committee members and represent their principal interest in the activity of a committee. 

M Manufacturer: A representative of a maker or marketer of a product, assembly or system, or portion thereof, that is affected by the standard. 

U User: A representative of an entity that is subject to the provisions of the standard or that voluntarily uses the standard. 

I/M lnstallcr/Maintainer: A representative of an entity that is in the business of installing or maintaining a product, assembly or system affected by 

the standard. 
L Labor: A labor representative or employee concerned with safety in the workplace. 

R/S/T Research/Standards/Testing Laboratory: A representative of an independent research organization; an organization that develops codes, 

standards or other similar documents; or an independent testing laboratory. 
E Enforcing Authority: A representative or an agency or an organization that promulgates and /or enforces standards. 

C Consumer: A person who is, or represents, the ultimate purchaser of a product, system, or service affected by the standard, but who is not 

included in the User classification. 
SE Special Expert: A person not representing any of the previous classifications, but who has special expertise in the scope of the standard or 

portion thereof. 



VII 



FORM FOR PROPOSALS ON IAPMO UPC/UMC COMMITTEE DOCUMENTS 

NOTE: All proposals MUST be received by 5:00 PM PST/PDST on February 1, 2010. 



For further information on the standards-making process, please 
contact Codes and Standards Administration at 909-472-41 10. 

For technical assistance, please call IAPMO at 909-230-5535 or 
909-472-41 1 1 . 


FOR OFFICE USE ONLY 
LOG#: 


DATEREC'D: 





PLEASE USE SEPARATE FORM FOR EACH PROPOSAL 

Please indicate in which format you wish to receive your ROP/ROC: □ Download* □ CD-ROM 

*Note: In choosing the download option, you intend to view the ROP/ROC from our website. NO CD-ROM will be sent to you. 



Date: 



Name:. 



Telephone #: 



Company:. 



Street Address:. 



City: . 



State: 



Zip:. 



Please Indicate Organization Represented (if any):, 



1 . IAPMO Document Title. 



IAPMO NO. & Year. 



Section/Paragraph 



2. Proposal Recommends (check one): □ New Text 



□ Revise Text 



□ Delete Text 



Proposal (Include proposed new wording, or identification of wording to be deleted): [Note: Proposed text should be in 
legislative format: i.e., use underscore to denote wording to be inserted ( inserted wording ) and strike-through to denote 
wording to be deleted ( do l otod word i ng ).] Please note if you are referencing a standard or other publication, please 
provide two copies. 



Statement of Problem and Substantiation for Proposal: [Note: State the problem that will be resolved by your 
recommendations; give the specific reason for your proposal, including copies of tests, research papers, etc. If more 
than 200 words, it may be abstracted for publication.] 



5. □ This proposal is original material. [Note: Original material is considered to be the submitter's own idea based on 
or as a result of his/her own experience, thought, or research and, to the best of his/her knowledge, is not copied from 
another source.] 

□ This proposal is not original material, its source (if known) is as follows: ^ 



I hereby grant the IAPMO all and full rights in copyright, in this proposal, and I understand that I acquire no rights in any 
publication of IAPMO in which this proposal in this or another similar or analogous form is used. 



Signature (Required): 



IAPMO CODES DEPARTMENT FAX • (909) 472-4198 or (877) 852-6337 
Mail to: Code Development • IAPMO •. 5001 E Philadelphia Street • Ontario • CA • 91761-2816 

Email to: codechange@iapmo.org 



VIII 



INSTRUCTIONS FOR SUBMITTING PROPOSALS 
- PLEASE READ CAREFULLY - 

1 . Type or print in BLACK ink. 

2. Indicate the title of the document and the document year. Also indicate the specific section or 
paragraph that the proposed amendment applies to. 

3. Check the appropriate box to indicate whether this proposal recommends adding new text, 
revising existing text, or deleting text. 

4. In the space identified as "Proposal", indicate the exact wording you propose as new or 
revised text, or the text you propose be deleted. 

5. In the space titled "Statement of Problem and Substantiation for Proposal", state the problem 
that will be resolved by your recommendation and give the specific reason for your proposal. 
Include copies of test results, research papers, fire experience, or other materials that 
substantiate your recommendation. [See note below, item (f).] 

6. Check the appropriate box to indicate whether or not this proposal is original material, and, if 
it is not, indicate the source of the material. 

7. Sign the proposal. 

If supplementary material (photographs, diagrams, reports, etc.) is included, you may be required 
to submit sufficient copies for all members and alternates of the technical committee. For 
publication in the Report on Proposals, the technical committee is authorized to abstract the 
"Statement of Problem and Substantiation for Proposal" if it exceeds 200 words. 

NOTE: The IAPMO Regulations Governing Committee Projects in Paragraph 4-3.3 state: Each 
proposal shall be submitted to the Council Secretary and shall include: 

(a) identification of the submitter and his or her affiliation (i.e., technical committee, organization, 
company), where appropriate; 

(b) identification of the document, edition of the document, and paragraph of the document to 
which the proposal is directed; 

(c) the proposed text of the proposal, including the wording to be added, revised (and how 
revised), or deleted; 

(d) a statement of the problem and substantiation for proposal; 

(e) the signature of the submitter; and 

(f) two copies of any document(s) (other than an IAPMO document) being proposed as a 
reference standard or publication (see 3-3.7). 



IX 



TABLE OF CONTENTS 

Chapter 1 Administration 1 310.4 

101.0 Title, Scope, and General 1 311.0 

101.1 Title 1 311.8 

101.2 Purpose 1 312.0 

101.3 Plans Required 1 313.0 

101.4 Scope 1 

101.5 Application to Existing 313.5 
Plumbing System 2 313.8 

102.0 Organization and Enforcement 2 313.10 

102.1 Authority Having Jurisdiction 2 313.12 

102.2 Duties and Powers of the 314.0 
Authority Having Jurisdiction 2 Table 3-1 

102.3 Violations and Penalties 3 315.0 

103.0 Permits and Inspections 3 

103.1 Permits 3 315 ' 3 

103.2 Application for Permit 3 316, ° 

103.3 Permit Issuance 4 316,1 

103.4 Fees 5 316 ' 2 

103.5 Inspections 6 

103.6 Connection Approval 7 

103.7 Unconstitutional 7 

103.8 Validity 8 318 '° 

Table 1-1 Plumbing Permit Fees 9 

320.0 

Chapter 2 Definitions 11 

201.0 General 11 

202.0 Definition of Terms 11 Chapter 4 

Chapter 3 General Regulations .21 

301 .0 Materials - Standards and Alternates . .21 

401 2 

301.1 Minimum Standards 21 

402 

301.2 Alternate Materials and Methods 

of Construction Equivalency 21 

402.2 

301.3 Flood Hazard Resistance 21 

402.3 

301.4 Alternative Engineered Design ....22 

402.4 
302.0 Iron Pipe Size (IPS) Pipe 22 

402 5 
303.0 Disposal of Liquid Waste 22 

304.0 Connections to Plumbing 

System Required 22 403 -° 

305.0 Sewers Required 22 404 "° 

306.0 Damage to Drainage System 4U4.1 

or Public Sewer 23 404.2 

307.0 Industrial Wastes 23 405.0 

308.0 Location 23 405.2 

309.0 Improper Location 23 406.0 

310.0 Workmanship 23 406.1 



Installation Practices 23 

Prohibited Fittings and Practices . . .23 

Screwed Fittings 23 

Independent Systems 24 

Protection of Piping, Materials, 

and Structures 24 

Protectively Coated Pipe 24 

Waterproofing of Openings 24 

Sleeves 24 

Ratproofing 24 

Hangers and Supports 25 

Hanger Rod Sizes 25 

Trenching, Excavation 

and Backfill 25 

Open Trenches 25 

Joints and Connections 25 

Types of Joints 25 

Special Joints 26 

Flanged Fixture Connections 27 

Prohibited Joints and Connections . .27 

Increasers and Reducers 27 

Food-Handling Establishments ... .27 

Test Gauges 27 

Medical Gas and Vacuum Systems . .27 

Hangers and Supports 28 

Plumbing Fixtures and 

Fixture Fittings 29 

Materials - General Requirements . .29 

Quality of Fixtures 29 

Lead 29 

Water-Conserving Fixtures and 
Fittings 29 

Water Closets 29 

Urinals 29 

Metered Faucets 29 

Emergency Safety Showers 29 

Installation 29 

Overflows 29 

Strainers and Connections 29 

Strainers 29 

Connections 29 

Prohibited Fixtures 30 

Prohibited Urinals , 30 

Special Fixtures and Specialties ... .30 

Water and Waste Connections 30 



UNIFORM PLUMBING CODE 



406.3 
406.4 
407.0 
407.1 
407.2 
407.3 
407.4 
407.5 
407.6 

407.7 
408.0 
408.2 
408.3 

408.4 
409.0 
410.0 

410.1 

410.2 

410.3 

410.4 

410.5 

411.0 

411.2 

411.3 

411.4 

411.10 

411.11 

412.0 

412.1 
412.2 
412.3 
412.4 

412.5 



412.6 
413.0 

413.1 

414.0 
414.5 



Special Use Fixtures 30 

Zinc Alloy Components 30 

Installation 30 

Cleaning 30 

Joints 30 

Securing Fixtures 30 

Wall-Hung Fixtures 30 

Setting 30 

Installations for Persons 

with Disabilities 30 

Supply Fittings 30 

Water Closets 30 

Water Closet Seats 30 

Securing Floor-Mounted, 
Back-Outlet Water Closet Bowls . . .31 

Closet Rings (Closet Flanges) 31 

Urinals 31 

Flushing Devices for Water 

Closets and Urinals 31 

Flushing Devices Required 31 

Automatic Flushing Tanks 31 

Flushometer Valves 31 

Water Supply for Flush Tanks 31 

Overflows in Flush Tanks 31 

Floor Drains and Shower Stalls ... .32 

Location of Floor Drains 32 

Food Storage Areas 32 

Floor Slope 32 

Location of Valves and Heads 33 

Water Supply Riser 33 

Minimum Number of 

Required Fixtures 34 

Fixture Count 34 

Access to Fixtures 34 

Separate Facilities 34 

Fixture Requirements 

for Special Occupancies 34 

Facilities in Mercantile 

and Business Occupancies 

Serving Customers 34 

Toilet Facilities for Workers 34 

Fixtures and Fixture Fittings 

for Persons with Disabilities 34 

Limitation of Hot Water 

Temperature for Public Lavatories . .34 

Bathtubs and Whirlpool Bathtubs . .34 

Limitation of Hot Water in 

Bathtubs and Whirlpool Bathtubs . . .34 



415.0 Installation of Fixture Fittings 34 

416.0 Bidets 35 

416.1 Materials 35 

416.2 Backflow Protection 35 

416.3 Limitation of Water Temperature 

in Bidets 35 

417.0 Future Fixtures 35 

418.0 Shower and Tub-Shower 

Combination Control Valves 35 

Table 4-1 Minimum Plumbing Facilities 36 

Chapter 5 Water Heaters 41 

Part 1 41 

501.0 General 41 

502.0 Definitions 41 

502.1 Appliance Categorized Vent 
Diameter/Area 41 

502.2 Chimney 41 

502.3 Chimney, Factory-Built 41 

502.4 Chimney, Masonry 41 

502.5 Chimney, Metal 41 

502.6 Combustible Material 41 

502.7 Direct-Vent Appliances 41 

502.8 Flue Collar 41 

502.9 Gas Vent, Type B 41 

502.10 Gas Vent, Type L 41 

502.11 Indirect-Fired Water Heater 41 

502.12 Vent 41 

Table 5-1 First Hour Rating 41 

502.13 Vent Connector 42 

502.14 Venting System 42 

502.15 Water Heater 42 

503.0 Permits 42 

504.0 Inspection 42 

504.1 Inspection of Chimneys or Vents . . .42 

504.2 Final Water Heater Inspection 42 

505.0 Water Heater Requirements 42 

505.1 Location 42 

505.3 Clearance 42 

505.4 Pressure-Limiting Devices 42 

505.5 Temperature-Limiting Devices 42 

505.6 Temperature, Pressure, and 
Vacuum Relief Devices 42 

506.0 Oil-Burning and Other Water 

Heaters 43 

506.4 Indirect-Fired Water Heaters 43 



XI 



TABLE OF CONTENTS 



507.0 Air for Combustion and 
Ventilation 43 

507.1 General ; .43 

507.2 Indoor Combustion Air 44 

507.3 Indoor Opening Size and 

Location 44 

507.4 Outdoor Combustion Air 44 

507.5 Combination Indoor and 

Outdoor Combustion Air 45 

507.6 Engineered Installations 45 

507.7 Mechanical Combustion 

Air Supply 45 

507.8 Louvers, Grilles and Screens 45 

507.9 Combustion Air Ducts 45 

508.0 Other Water Heater Installation 

Requirements 46 

508.5 Relief Valve Discharge 46 

508.6 Added or Converted Appliances . . .46 

508.7 Types of Gases 46 

508.8 Safety Shutoff Devices for 
Unlisted LP-Gas Appliance 

Used Indoors 46 

508.9 Use of Air or Oxygen Under 
Pressure 47 

508.10 Protection of Gas Appliances 
from Fumes or Gases Other than 
Products of Combustion 47 

508.11 Process Air 47 

508.12 Building Structural Members 47 

508.13 Flammable Vapors 47 

508.14 Installation in Residential 

Garages 47 

508.15 Installation in Commercial 

Garages 47 

508.16 Installation in Aircraft Hangars ... .48 

508.17 Gas Appliance Physical Protection .48 

508.18 Venting of Flue Gases 48 

508.19 Extra Device or Attachment 48 

508.20 Adequate Capacity of Piping 48 

508.21 Avoiding Strain on Gas Piping 48 

508.22 Gas Appliance Pressure 
Regulators 48 

508.23 Venting of Gas Appliance 

Pressure Regulators 48 

508.24 Bleed Lines for Diaphragm-Type 
Valves 48 

508.25 Combination of Appliances 49 

508.26 Installation Instructions 49 



508.27 
509.0 
509.1 
509.2 

509.3 
509.4 
510.0 
510.1 
510.2 
510.3 
510.4 
510.5 

Table 5-2 

510.6 
Table 5-3 
Table 5-4 

Table 5-5 



510.7 
510.8 

510.9 
510.10 

Table 5-6 



510.11 

510.12 
510.13 
510.14 

510.15 
511.0 

511.2 

Table 5-7 
512.0 



Protection of Outdoor Appliances . .49 

Appliances on Roofs 49 

General 49 

Installation of Appliances on 

Roofs 49 

Access to Appliances on Roofs 49 

Appliances in Attics 50 

Venting of Appliances 50 

General 50 

Specification for Venting 50 

Design and Construction 51 

Type of Venting System to Be Used .52 

Masonry, Metal, and 

Factory-Built Chimneys 52 

Type of Venting System 

to Be Used 55 

Gas Vents 55 

Clearance for Connectors ........ .56 

Reduction of Clearances with 
Specified Forms of Protection 58 

Minimum Thickness for 
Galvanized Steel Vent 
Connector for Low-Heat 
Appliances 59 

Single-Wall Metal Pipe 59 

Through -the- Wall Vent 

Termination 61 

Condensation Drain 61 

Vent Connectors for Category I 

Gas Utilization Appliances . 61 

Minimum Thickness for Steel 
Vent Connectors for Medium-Heat 
Appliances and Commercial and 
Industrial Incinerators 62 

Vent Connectors for Category II, 
Category III, and Category IV Gas 
Utilization Appliances 64 

Draft Hoods and Draft Controls ... .64 

Manually Operated Dampers 65 

Automatically Operated Vent 
Dampers 65 

Obstructions 65 

Sizing of Category I Venting 

Systems 65 

Additional Requirements to 

Multiple Appliance Vent 

Table 5-14 through Table 5-22 67 

Vent Connector Maximum Length . . .67 

Direct- Vent Appliances .70 



XII 



UNIFORM PLUMBING CODE 



Table 5-8 Type B Double-Wall Gas Vent 73 

Table 5-9 Type B Double-Wall Gas Vent 76 

Table 5-10 Masonry Chimney . . . .' 78 

Table 5-11 Masonry Chimney 80 

Table 5-12 Single-Wall Metal Pipe or 

Type B Asbestos Cement Vent 82 

Table 5-13 Exterior Masonry Chimney 83 

Table 5-14 Type B Double-Wall Vent 84 

Table 5-15 Type B Double-Wall Vent 88 

Table 5-16 Masonry Chimney 90 

Table 5-17 Masonry Chimney 92 

Table 5-18 Single-Wall Metal Pipe or Type B 

Asbestos Cement Vent 94 

Table 5-19 Exterior Masonry Chimney 94 

Table 5-20 Exterior Masonry Chimney 95 

Table 5-21 Exterior Masonry Chimney 96 

Table 5-22 Exterior Masonry Chimney 97 

Part II Sizing of Venting 

Systems Serving 

Appliances Equipped 

with Draft Hoods, 

Category I Appliances, 

and Appliances Listed 

for Use with Type B Vents. 98 

G.l Examples Using Single 

Appliance Venting Tables 98 

G.2 Examples Using Common 

Venting Tables 102 

Table G.Z3 Masonry Chimney Liner 
Dimensions with Circular 
Equivalents 103 

J.l Example of Combination 
Indoor and Outdoor 
Combustion Air Opening 105 

Table A.9.3.2.1 Standard Method Volume, 

All Appliances 106 

Chapter 6 Water Supply and Distribution . .107 

601.0 Hot and Cold Water Required . . . .107 

601.2 Identification of a Potable 

and Nonpotable Water System . . . .107 

Table 6-1 Minimum Length of Color Field 

and Size of Letters 107 

602.0 Unlawful Connections 107 

Table 6-2 Backflow Prevention Devices, 

Assemblies and Methods 108 

Table 6-3 Minimum Airgaps for Water 

Distribution 110 

603.0 Cross-Connection Control 110 



603.1 

603.2 

603.3 
603.4 
604.0 
Table 6-4 



604.11 
604.12 

604.13 

604.14 

605.0 

606.0 

606.1 

606.2 

607.0 

608.0 



608.1 
608.2 
608.7 
609.0 

609.1 
609.4 
609.5 
609.6 
609.8 

609.9 

609.10 

610.0 

610.8 

610.9 

610.10 

610.11 

610.12 
610.13 



Approval of Devices or 

Assemblies 110 

Backflow Prevention Devices, 
Assemblies, and Methods Ill 

General Requirements Ill 

Specific Requirements 112 

Materials 114 

Materials for Building Supply 

and Water Distribution Piping 

and Fittings . ■ 115 

PEX 115 

Flexible Corrugated Connectors . . .115 

PEX-AL-PEX and PE-AL-PE 115 

Water Heater Connectors 116 

Valves 116 

Joints and Connections 116 

Types of Joints 116 

Use of Joints 116 

Gravity Supply Tanks 117 

Water Pressure, Pressure 

Regulators, Pressure Relief 

Valves, and Vacuum Relief 

Valves 117 

Inadequate Water Pressure 117 

Excessive Water Pressure 117 

Vacuum Relief Valves 118 

Installation, Testing, Unions, 

and Location 118 

Installation 118 

Testing 118 

Unions 118 

Location 118 

Low-Pressure Cutoff Required 
on Booster Pumps for Water 
Distribution Systems 119 

Disinfection of Potable 

Water System 119 

Water Hammer 119 

Size of Potable Water Piping 119 

Size of Meter and Building 

Supply Pipe Using Table 6-6 120 

Size of Branches 120 

Sizing for Flushometer Valves 120 

Sizing Systems for 

Flushometer Tanks 121 

Sizing for Velocity 121 

Exceptions 121 



XIII 



TABLE OF CONTENTS 



61 1 .0 Drinking Water- Treatment 

Units 121 

611.1 Compliance with Standard 121 

611.2 Airgap Discharge 121 

611.3 Connection Tubing 121 

611.4 Sizing of Residential Softeners . . . .121 

Table 6-5 Water Supply Fixture 

Units (WSFU) and Minimum 
Fixture Branch Pipe Sizes 122 

Table 6-6 Fixture Unit Table for 
Determining Water 
Pipe and Meter Sizes 123 

Table 6-7 Flushometer Fixture Units for 

Water Sizing Using Table 6-5 124 

Table 6-8 Sizing of Residential Water 

Softeners 124 

Chapter 7 Sanitary Drainage 125 

Part I Drainage Systems 125 

701.0 Materials 125 

701.3 Lead 125 

701.4 Ferrules and Bushings 125 

Table 7-2(a) Caulking Ferrules 125 

Table 7-2(b) Soldering Bushings 125 

Table 7-1 Materials for Drain, Waste 

Vent Pipe, and Fittings 126 

702.0 Fixture Unit Equivalents 127 

Table 7-4 Discharge Capacity In Gallons 
per Minute (Liters per Second) 
For Intermittent Flow Only 127 

703.0 Size of Drainage Piping 127 

704.0 Fixture Connections (Drainage) . . .127 

705.0 Joints and Connections 127 

705.1 Types of Joints 127 

Table 7-3 Drainage Fixture Unit Values 

(DFU) 128 

Table 7-5 Maximum Unit Loading and 
Maximum Length of Drainage 
and Vent Piping 129 

705.2 Use of Joints 129 

705.3 Special Joints 130 

706.0 Changes in Direction of Drainage 

Flow 130 

707.0 Cleanouts 130 

708.0 Grade of Horizontal Drainage 

Piping 131 

709.0 Gravity Drainage Required 131 



710.0 



Table 7-6 

710.12 

710.13 

711.0 

712.0 

712.1 

712.2 

712.3 

Part II 

713.0 

714.0 

715.0 
716.0 
717.0 
718.0 

719.0 
720.0 
721.0 

722.0 

Table 7-7 
Table 7-8 

723.0 

Chapter 8 

801.0 
801.1 
801.2 

801.3 
801.4 

801.5 
801.6 
802.0 
803.0 
804.0 
805.0 



Drainage of Fixtures Located 

Below the Next Upstream 

Manhole or Below the Main 

Sewer Level 131 

Cleanouts 131 

Grinder Pump Ejector 132 

Macerating Toilet Systems 132 

Suds Relief 133 

Testing 133 

Media 133 

Water Test 133 

Air Test 133 

Building Sewers 133 

Sewer Required 133 

Damage to Public Sewer or Private 
Sewage Disposal System 134 

Building Sewer Materials 134 

Markings 134 

Size of Building Sewers 134 

Grade, Support, and Protection of 
Building Sewers 134 

Cleanouts 135 

Sewer and Water Pipes 135 

Location 135 

Abandoned Sewers and Sewage 
Disposal Facilities 136 

Minimum Horizontal Distance 
Required From Building Sewer ... .136 

Maximum /Minimum Fixture 

Unit Loading on Building 

Sewer Piping 136 

Building Sewer Test 137 

Indirect Wastes 139 

Indirect Wastes 139 

Airgap or Airbreak Required 139 

Food and Beverage Handling 
Establishments 139 

Bar and Fountain Sink Traps 139 

Connections from Water 

Distribution System 139 

Sterilizers 139 

Drip or Drainage Outlets 139 

Approvals 139 

Indirect Waste Piping 139 

Indirect Waste Receptors 140 

Pressure Drainage Connections . . .140 



XIV 



UNIFORM PLUMBING CODE 



806.0 Sterile Equipment 140 

807.0 Appliances 140 

808.0 Cooling Water 140 

809.0 Drinking Fountains 141 

810.0 Steam and Hot Water Drainage 

Condensers and Sumps 141 

Table 8-1 Pipe Connections in Blowoff 

Condensers and Sumps 141 

810.4 Strainers 141 

811.0 Chemical Wastes 141 

812.0 Clear Water Wastes 142 

813.0 Swimming Pools 142 

814.0 Condensate Wastes and 

Control 142 

814.1 Condensate Disposal 142 

814.2 Size 142 

Table 8-2 Minimum Condensate Pipe Size . .142 

814.3 Point of Discharge 142 

Chapter 9 Vents 143 

901.0 General 143 

901.1 Vents Required 143 

901.2 Trap Seal Protection 143 

902.0 Vents Not Required 143 

903.0 Materials 143 

903.2 Use of Copper Tubing 143 

904.0 Size of Vents 143 

905 .0 Vent Pipe Grades and 

Connections 144 

906.0 Vent Termination 144 

906.6 Lead 144 

906.7 Frost or Snow Closure 144 

907.0 Vent Stacks and Relief Vents 144 

908.0 Wet Venting 145 

908.1 Vertical Wet Venting 145 

908.2 Horizontal Wet Venting for 
Bathroom Groups 145 

909.0 Special Venting for Island 

Fixtures 145 

910.0 Combination Waste and 

Vent Systems 145 

911.0 Engineered Vent System 146 

911.1 General 146 

911.2 Minimum Requirements 146 

Chapter 10 Traps and Interceptors 147 

1001.0 Traps Required 147 



1002.0 Traps Protected by Vent Pipes ... .147 

Table 10-1 Horizontal Lengths of Trap 

Arms 147 

1003.0 Traps - Described 147 

1004.0 Traps - Prohibited 148 

1005.0 Trap Seals 148 

1006.0 Floor Drain Traps 148 

1007.0 Trap Seal Protection 148 

1008.0 Building Traps 148 

1009.0 Industrial Interceptors (Clarifiers) 
and Separators 148 

1009.1 When Required 148 

1009.2 Approval 148 

1009.3 Design 148 

1009.4 Relief Vent 148 

1009.5 Location 148 

1009.6 Maintenance of Interceptors 148 

1009.7 Discharge 149 

1010.0 Slaughterhouses, Packing 

Establishments, etc 149 

1011.0 Minimum Requirements 

for Auto Wash Racks 149 

1012.0 Commercial and Industrial 

Laundries 149 

1013.0 Bottling Establishments 149 

1014.0 Grease Interceptors 149 

1014.2 Hydromechanical Grease 
Interceptors 149 

1014.3 Gravity Grease Interceptors 150 

Table 10-2 Hydro-Mechanical Interceptor 

Sizing Using Gravity Flow Rates . .150 

Table 10-3 Gravity Grease Interceptor Sizing . .151 

1015.0 FOG (Fats, Oils, and Greases) 
Disposal System 151 

1015.1 Purpose 151 

1015.2 Scope 152 

1015.3 Components, Materials, 

and Equipment 152 

1015.4 Sizing Application 

and Installation 152 

1015.5 Performance 152 

1016.0 Sand Interceptors 152 

1016.1 Where Required 152 

1016.2 Construction and Size 152 

1016.3 Separate Use 152 

1017.0 Oil and Flammable 

Liquid Interceptors 152 



xv 



TABLE OF CONTENTS 

1017.1 Interceptors Required 152 1106.1 

1017.2 Design of Interceptors 153 1106.2 

Chapter 11 Storm Drainage 155 1106.3 

1101.0 General 155 1106.4 

1101.1 Where Required 155 1107.0 

1101.2 Storm Water Drainage to 1108.0 
Sanitary Sewer Prohibited 155 1108.1 

1101.3 Materia] Uses 155 fable 114 

1101.4 Expansion Joints Required 155 

1101.5 Subsoil Drains 155 Table 11-5 

1101.6 Building Subdrains 156 

1101.7 Areaway Drains 156 1108.2 

1101.8 Window Areaway Drains 156 1109.0 

1101.9 Filling Stations and Motor 1109.1 
Vehicle Washing Establishments . . .156 1109.2 

1101.10 Paved Areas 156 

1101.11 Roof Drainage 156 Table 11-1 

1101.12 Cleanouts 157 

1102.0 Materials 157 Table n " 2 

1102.1 Conductors 157 

1102.2 Leaders 157 Table 11_3 

1102.3 Underground Building 

Storm Drains 157 Chapter 12 

1102.4 Building Storm Sewers 157 1201.0 

1102.5 Subsoil Drains 157 1202.0 

1103.0 Traps on Storm Drains 1203.0 
and Leaders 157 1203.1 

1103.1 Where Required 157 1203.2 

1103.2 Where Not Required .157 1203.3 

1103.3 Trap Size 157 ^203 4 

1103.4 Method of Installation of 1203 5 

Combined Sewer 157 

1203.6 

1104.0 Leaders, Conductors, 

and Connections 157 1203.7 

1104.1 Improper Use 157 

1 203 8 

1104.2 Protection of Leaders 157 

1104.3 Combining Storm with 

Sanitary Drainage 157 

1 203 1 

1105.0 Roof Drains 157 U 

1105.1 Material 157 1203 - 11 

1105.2 Dome or Strainer for 1204 -° 
General Use 158 1205.0 

1105.3 Strainers for Flat Decks 158 1206.0 

1105.4 Roof Drain Flashings 158 

1 106.0 Size of Leaders, Conductors, 1207, ° 

and Storm Drains 158 1208.0 



Vertical Conductors and Leaders . .158 

Size of Horizontal Storm 

Drains and Sewers .158 

Size of Roof Gutters 158 

Side Walls Draining onto a Roof . .158 

Values for Continuous Flow 158 

Controlled-Flow Roof Drainage . . .158 
Application 158 

Controlled-Flow Maximum Roof 
Water Depth 159 

Distance of Scupper Bottoms 

Above Roof 159 

Setback Roofs 159 

Testing 159 

Testing Required 159 

Methods of Testing Storm 

Drainage Systems 159 

Sizing Roof Drains, Leaders, 

and Vertical Rainwater Piping ... .161 

Sizing of Horizontal Rainwater 
Piping 162 

Size of Gutters 164 

Fuel Piping 167 

Scope of Gas Piping 167 

General 167 

Definitions 167 

Appliance Fuel Connector 167 

Bonding Jumper 167 

Fuel Gas 167 

Gas Piping 168 

Gas-Piping System 168 

Grounding Electrode 168 

Liquefied Petroleum 

Gas (LPG) Facilities 168 

Provision for Location of 

Point of Delivery 168 

Quick-Disconnect Device 168 

Service Piping 168 

Transition Gas Riser 168 

Inspection 168 

Certificate of Inspection 168 

Authority to Render 

Gas Service 168 

Authority to Disconnect 169 

Temporary Use of Gas 169 



XVI 



UNIFORM PLUMBING CODE 



1209.0 Gas-Piping System Design, 
Materials, and Components 169 

1209.1 Piping Plan 169 

1209.2 Provision for Location of 

Point of Delivery 169 

1209.3 Interconnections Between 
Gas-Piping Systems 169 

1209.4 Sizing of Gas-Piping Systems 169 

1209.5 Acceptable Piping Materials 

and Joining Methods 170 

Table 12-1 Approximate Gas Input for 

Typical Appliances 170 

Table 12-2 Specifications for Threading 

Metallic Pipe 172 

1209.6 Gas Meters 173 

1209.7 Gas Pressure Regulators 174 

1209.8 Back-Pressure Protection 175 

1209.9 Low-Pressure Protection 175 

1209.10 Shutoff Valves 175 

1209.11 Expansion and Flexibility 175 

1210.0 Excess Flow Valve 176 

1211.0 Gas Piping Installation 176 

1211.1 Piping Underground 176 

1211.2 Installation of Piping 177 

Table 12-3 Support of Piping 178 

1211.3 Concealed Piping in Buildings . . . .178 

1211.4 Piping in Vertical Chases 178 

1211.5 Maximum Design Operating 
Pressure 178 

1211.6 Appliance Over Pressure 
Protection 179 

1211.7 Gas Pipe Turns 179 

1211.8 Drips and Sediment Traps 180 

1211.9 Outlets 180 

1211.10 Branch Pipe Connection 180 

1211.11 Manual Gas Shutoff Valves 180 

1211.12 Prohibited Devices 181 

1211.13 Systems Containing Gas- Air 
Mixtures Outside the 

Flammable Range 181 

1211.14 Systems Containing 

Flammable Gas-Air Mixtures 181 

1211.15 Electrical Bonding and Grounding 181 

1211.16 Electrical Circuits 181 

1211.17 Electrical Connections 181 

1212.0 Appliance Connections 

to Building Piping ". .181 



1212.1 Connecting Gas Appliances 181 

1212.2 Suspended Low-Intensity 

Infrared Tube Heaters 182 

1212.3 Use of Nonmetallic Gas Hose 
Connectors 182 

1212.4 Connection of Portable and Mobile 
Industrial Gas Appliance 182 

1212.5 Appliance Shutoff Valves 

and Connections 182 

1212.6 Quick-Disconnect Devices 182 

1212.7 Sediment Trap 182 

1212.8 Installation of Piping 183 

1213.0 Liquefied Petroleum Gas Facilities 

and Piping 183 

1214.0 Pressure Testing and Inspection . . .183 

1214.1 General 183 

1214.2 Test Preparation 183 

1214.3 Test Pressure 184 

1214.4 Detection of Leaks and Defects 184 

1214.5 Piping Systems Leak Check 184 

1214.6 Purging 184 

Table 12-5 Length of Piping Requiring 
Purging with Inert Gas for 
Servicing or Modification 184 

Table 12-6 Length of Piping Requiring 
Purging with Inert Gas 
Before Placing in Operation 185 

1215.0 Interconnections Between 

Gas Piping Systems 185 

1215.1 Interconnections Supplying 
Separate Users 185 

1215.2 Inter connect ions for 

Standby Fuels 185 

1216.0 Required Gas Supply 185 

1217.0 Required Gas Piping Size 186 

1217.1 Pipe Sizing Methods 186 

1217.2 Tables for Sizing Gas-Piping 
Systems 186 

1217.3 Sizing Equations 186 

Table 12-4 Cr and Y for Natural Gas and 

Undiluted Propane at Standard 

Conditions 186 

Table 12-8 Schedule 40 Metallic Pipe 189 

Table 12-9 Schedule 40 Metallic Pipe 190 

Table 12-10 Schedule 40 Metallic Pipe 191 

Table 12-11 Schedule 40 Metallic Pipe 192 

Table 12-12 Semi-Rigid Copper Tubing 193 

Table 12-13 Semi-Rigid Copper Tubing 194 



XVII 



TABLE OF CONTENTS 



Table 12-14 Semi-Rigid Copper Tubing 195 

Table 12-15 Semi-Rigid Copper Tubing 196 

Table 12-16 Semi-Rigid Copper Tubing .197 

Table 12-17 Semi-Rigid Copper Tubing .198 

Table 12-18 Semi-Rigid Copper Tubing 199 

Table 1249 Corrugated Stainless Steel 

Tubing (CSST) 200 

Table 12-20 Corrugated Stainless Steel 

Tubing (CSST) 200 

Table 12-21 Corrugated Stainless Steel 

Tubing (CSST) 201 

Table 12-22 Corrugated Stainless Steel 

Tubing (CSST) 201 

Table 12-23 Corrugated Stainless Steel 

Tubing (CSST) 202 

Table 12-24 Polyethylene Plastic Pipe 202 

Table 12-25 Polyethylene Plastic Pipe 203 

Table 12-26 Polyethylene Plastic Pipe 204 

Table 12-27 Polyethylene Plastic Tubing 205 

Table 12-28 Polyethylene Plastic Tubing 205 

Table 12-29 Schedule 40 Metallic Pipe 206 

Table 12-30 Schedule 40 Metallic Pipe 207 

Table 12-31 Schedule 40 Metallic Pipe 208 

Table 12-32 Schedule 40 Metallic Pipe 209 

Table 12-33 Semi-Rigid Copper Tubing 210 

Table 12-34 Semi-Rigid Copper Tubing 211 

Table 12-35 Semi-Rigid Copper Tubing 212 

Table 12-36 Corrugated Stainless Steel 

Tubing (CSST) 213 

Table 12-37 Corrugated Stainless Steel 

Tubing (CSST) 213 

Table 12-38 Corrugated Stainless Steel 

Tubing (CSST) 214 

Table 12-39 Polyethylene Plastic Pipe 214 

Table 12-40 Polyethylene Plastic Pipe 215 

Table 1241 Polyethylene Plastic Tubing 216 

Chapter 13 Health Care Facilities and 
Medical Gas and Vacuum 
Systems 217 

Part I Special Requirements for 

Health Care Facilities ...... 217 

1301.0 Application 217 

1302.0 Medical Gas and Vacuum Piping 

Systems-Installation Requirements . .217 

1303.0 Protrusions from Walls 217 

1304.0 Psychiatric Patient Rooms 217 



1305.0 Locations for Ice Storage 217 

1306.0 Sterilizers 217 

1306.1 General 217 

1306.2 Indirect Waste Connections 217 

1307.0 Vapor Vents and Stacks 

for Sterilizers 218 

1307.1 General 218 

1308.0 Aspirators 218 

Part II Medical Gas and Vacuum 

Systems 218 

1309.0 Application 218 

1310.0 Definitions 218 

1310.1 Building Supply 218 

1310.2 Critical Care Area 218 

1310.3 General Care Areas 218 

1310.4 Manifold 218 

1310.5 Medical Air 218 

1310.6 Medical Gas : .219 

1310.7 Medical Gas System 219 

1310.8 Medical Vacuum System .219 

1310.9 Nitrogen, NF (Oil-Free, Dry) 
(Nitrogen for Brazing 

and Testing) 219 

1310.10 Patient Care Area 219 

1310.11 Purge, Flow 219 

1310.12 Purge, System 219 

1310.13 SCFM 219 

1310.14 Special Hazard Area 219 

1310.15 Station Inlet 219 

1310.16 Station Outlet 219 

1310.17 Use Point 219 

1310.18 User Outlet 219 

1310.19 Vacuum System - Level 1 219 

1310.20 Valve, Isolation 219 

1310.21 Valve, Riser 219 

1310.22 Valve, Service .219 

1310.23 Valve, Source 219 

1310.24 Valve, Zone 219 

1310.25 Waste Anesthetic Gas Disposal . . .219 

1311.0 General Requirements 219 

1311.1 Oxygen Compatibility 219 

1312.0 Plan Review 220 

1313.0 System Performance 221 

1313.1 Required Operating Pressures 221 

1313.2 Minimum Flow Rates 221 

1313.3 Minimum Station Outlets /Inlets ...221 



XVIII 



UNIFORM PLUMBING CODE 



1314.0 Required Pipe Sizing 221 

1315.0 Workmanship 221 

1316.0 Materials 221 

1317.0 Cleaning for Medical Gas 

Piping Systems 223 

1318.0 Installation of Piping 223 

1319.0 Joints 224 

1320.0 Valves - Requirements, 
Locations, and Labeling 226 

1320.1 General Requirements 226 

1320.4 Source Valve 227 

1320.5 Main Valve 227 

1320.6 Riser Valve 227 

1320.7 Zone Valve 227 

1320.8 Service Valves 227 

1321.0 Pressure-Regulating 

Equipment 228 

1321.3 Pressure Gauges 228 

1322.0 Station Outlets /Inlets 228 

1323.0 Labeling and Identification 228 

1324.0 Alarms 229 

1325.0 Medical Air System 229 

1325.6 Medical Air Receivers 230 

1326.0 Medical Vacuum Pump 

System 230 

1327.0 Testing and Inspection 231 

1327.3 Advance Notice 232 

1327.4 Responsibility 232 

1327.5 Testing .232 

1327.6 Retesting 232 

1327.7 Initial Pressure Test - 

Piped Gas Systems 232 

1327.8 Cross-Connection Test - 

Piped Gas Systems 232 

1327.9 Final Testing Standing 
Pressure Test - Piped 

Gas Systems .7. 232 

1327.10 Initial Pressure Test - 

Piped Vacuum Systems 233 

1327.11 Standing Pressure Test - 

Piped Vacuum Systems 233 

1327.12 Corrections 233 

1327.13 Approval 234 

1327.14 Covering or Use 234 

1327.15 Uncovering 234 

1328.0 System Certification 234 



Table 13-1 Standard Designation Colors 
and Operating Pressures for 
Gas and Vacuum Systems 235 

Minimum Flow Rates 236 

Minimum Outlets /Inlets per 

Station 236 



Table 13-2 
Table 13-3 

Table 134 

Table 13-5 

Table 13-6 
Table 13-7 



System Sizing - Flow Requirements 
for Station Inlet /Outlet 237 

Outlet Rating for Vacuum 

Piping Systems 237 

Size of Gas /Vacuum Piping 238 

Maximum Pipe Support Spacing . . .238 



Chapter 14 Referenced Standards 239 

Table 14-1 Standards for Materials, 
Equipment, Joints, and 
Connections 239 

Abbreviations in Table 14-1 265 

Chapter 15 Firestop Protection 267 

1501.0 General Requirements 267 

1501.1 Applicability 267 

1502.0 Plans and Specifications 267 

1503.0 Installation 267 

1504.0 Definitions 267 

1504.1 Penetration Firestop System 267 

1504.2 F Rating 267 

1504.3 T Rating 267 

1505.0 Combustion Piping 

Installations 267 

1505.5 Insulation and Coverings 267 

1505.6 Sleeves 267 

1506.0 Non-Combustible 

Piping Installation .267 

1506.6 Sleeves 268 

1506.7 Insulation and Coverings 268 

1507.0 Required Inspection 268 

1507.1 General 268 

Chapter 1 6 Nonpotable Water Reuse Systems 269 
Part I 269 

1601.0 Gray Water Systems - General . . . .269 

1602.0 Definition 269 

1603.0 Permit 269 

1604.0 Drawings and Specifications 269 



XIX 



TABLE OF CONTENTS 



1605.0 Inspection and Testing 269 

1606.0 Procedure for Estimating Gray 

Water Discharge 270 

1607.0 Required Area of Subsurface 

Irrigation /Disposal Fields 270 

1608.0 Determination of Maximum 

Absorption Capacity 270 

1609.0 Holding Tank Construction 270 

1610.0 Gray Water Systems .271 

1610.1 Pipe Materials 271 

1610.2 Color and Information 271 

1610.3 Valves 271 

1610.4 Trap 271 

1611.0 Irrigation /Disposal Field 

Construction 271 

1612.0 Special Provisions 272 

Table 16-1 Location of Gray Water System . . .273 

Table 16-2 Design Criteria of Six Typical 

Soils V 274 

Part II ' 280 

1613.0 Reclaimed Water Systems - 

General 280 

1614.0 Definitions 280 

1615.0 Permit 280 

1616.0 Drawings and Specifications 280 

1617.0 Pipe Material /Pipe 

Identification 280 

1617.1 Pipe Materials 280 

1617.2 Color and Information 280 

1618.0 Installation 281 

1619.0 Signs 281 

1620.0 Inspection and Testing 281 

1621.0 Sizing 282 

Appendices Table of Contents 283 

Appendix A Recommended Rules for Sizing 

the Water Supply System ....... .285 

Appendix B Explanatory Notes on Combination 

Waste and Vent Systems 301 

Appendix D Sizing Stormwater Drainage 

Systems 303 

Appendix E Manufactured /Mobile Home 
Parks and Recreational Vehicle 
Parks 311 

Appendix F Firefighter Breathing Air 

Replenishment Systems 323 

Appendix I Installation Standards 

Table of Content 327 



Appendix K Private Sewage Disposal 

Systems 433 

Appendix L Alternate Plumbing Systems 445 

Useful Tables 453 

Index 461 



xx 



CHAPTER 1 

ADMINISTRATION 



101.0 Title, Scope, and General. 

101.1 Title. 

This document shall be known as the "Uniform 
Plumbing Code/' may be cited as such, and will be 
referred to herein as "this code/' 

101.2 Purpose. 

This code is an ordinance providing minimum 
requirements and standards for the protection of the 
public health, safety, and welfare. 

101.3 Plans Required. 

The Authority Having Jurisdiction shall be permitted 
to require the submission of plans, specifications, 
drawings, and such other information as required by 
the Authority Having Jurisdiction, prior to the 
commencement of, and at any time during the 
progress of, any work regulated by this code. 

The issuance of a permit upon plans and specifi- 
cations shall not prevent the Authority Having Juris- 
diction from thereafter requiring the correction of 
errors in said plans and specifications or from 
preventing construction operations being carried on 
thereunder when in violation of this code or of any 
other pertinent ordinance or from revoking any 
certificate of approval when issued in error. 

101.4 Scope. 

101.4.1 The provisions of this code shall apply to 
the erection, installation, alteration, repair, relo- 
cation, replacement, addition to, use, or mainte- 
nance of plumbing systems within this 
jurisdiction. 

101.4.1.1 Repairs and Alterations. 

101.4.1.1.1 In existing buildings or 
premises in which plumbing installations 
are to be altered, repaired, or renovated, 
deviations from the provisions of this 
code are permitted, provided such 
deviations are found to be necessary 
and are first approved by the Authority 
Having Jurisdiction. 

101.4.1.1.2 Existing building sewers 
and building drains shall be permitted 
to be used in connection with new 
buildings or new plumbing and 
drainage work only when they are found 
on examination and test to conform in all 
respects to the requirements governing 
new work, and the proper Authority 



Having Jurisdiction shall notify the 
owner to make any changes necessary to 
conform to this code. No building, or 
part thereof, shall be erected or placed 
over any part of a drainage system that 
is constructed of materials other than 
those approved elsewhere in this code 
for use under or within a building. 
101.4.1.1.3 Openings into a drainage or 
vent system, excepting those openings to 
which plumbing fixtures are properly 
connected or which constitute vent 
terminals, shall be permanently plugged 
or capped in an approved manner, using 
the appropriate materials required by 
this code. 

101.4.1.2 Maintenance. The plumbing and 
drainage system of any premises under the 
Authority Having Jurisdiction shall be main- 
tained in a sanitary and safe operating 
condition by the owner or the owner's agent. 

101.4.1.3 Existing Construction. No provi- 
sion of this code shall be deemed to 
require a change in any portion of a plumbing 
or drainage system or any other work regu- 
lated by this code in or on an existing 
building or lot when such work was 
installed and is maintained in accordance 
with law in effect prior to the effective date 
of this code, except when any such plumbing 
or drainage system or other work regulated 
by this code is determined by the Authority 
Having Jurisdiction to be in fact dangerous, 
unsafe, insanitary, or a nuisance and a 
menace to life, health, or property. 

101.4.1.4 Conflicts Between Codes. When 
the requirements within the jurisdiction of 
this plumbing code conflict with the require- 
ments of the mechanical code, this code shall 
prevail. 

101.4.2 Additions, alterations, repairs, and 
replacement of plumbing systems shall comply 
with the provisions for new systems except as 
otherwise provided in Section 101.5. 

101.4.3 The provisions in the appendices are 
intended to supplement the requirements of this 
code and shall not be considered part of this 
code unless formally adopted as such. 



101.5-102.2 



UNIFORM PLUMBING CODE 



101.5 Application to Existing Plumbing System. 

101.5.1 Additions, Alterations, or Repairs. 

Additions, alterations, or repairs shall be 
permitted to be made to any plumbing system 
without requiring the existing plumbing system 
to comply with all the requirements of this code, 
provided the addition, alteration, or repair 
conforms to that required for a new plumbing 
system. Additions, alterations, or repairs shall 
not cause an existing system to become unsafe, 
insanitary, or overloaded. 

101.5.2 Health and Safety. Whenever compli- 
ance with the provisions of this code 
fails to eliminate or alleviate a nuisance, or any 
other dangerous or insanitary condition that 
may involve health or safety hazards, the owner 
or the owner's agent shall install such additional 
plumbing and drainage facilities or shall make 
such repairs or alterations as may be ordered by 
the Authority Having Jurisdiction. 

101.5.3 Existing Installation. Plumbing 
systems lawfully in existence at the time of the 
adoption of this code may have their use, 
maintenance, or repair continued if the use, 
maintenance, or repair is in accordance with the 
original design and location and no hazard to 
life, health, or property has been created by 
such plumbing system. 

101.5.4 Changes in Building Occupancy. 

Plumbing systems that are a part of any 
building or structure undergoing a change in use 
or occupancy, as defined in the Building Code, 
shall comply to the requirements of this code 
that may be applicable to the new use or "occu- 
pancy. 

101.5.5 Maintenance. Plumbing systems, 
materials, and appurtenances, both existing and 
new, and parts thereof shall be maintained in 
proper operating condition. Devices or safe- 
guards required by this code shall be maintained 
in conformance with the code edition under 
which installed. The owner or the owner's 
designated agent shall be responsible for mainte- 
nance of plumbing systems. To determine 
compliance with this subsection, the Authority 
Having Jurisdiction shall be permitted to cause 
any plumbing system to be reinspected. 

101.5.6 Moved Buildings. Plumbing systems 
that are part of buildings or structures moved 
into this jurisdiction shall comply with the 
provisions of this code for new installations, 
except as provided for in Section 103.5.5.2. 



102.0 Organization and Enforcement. 

102.1 Authority Having Jurisdiction, 

The Authority Having Jurisdiction shall be the 
Authority duly appointed to enforce this code. 

102.2 Duties and Powers of the Authority Having 
Jurisdiction. 

102.2.1 The Authority Having Jurisdiction shall 
be permitted to appoint such assistants, 
deputies, inspectors, or other employees as 
necessary to carry out the functions of the 
department and this code. 

102.2.2 Right of Entry. Whenever it is 
necessary to make an inspection to enforce the 
provisions of this code, or whenever the 
Authority Having Jurisdiction has reasonable 
cause to believe that there exists in any building 
or upon any premises any condition or violation 
of this code that makes the building or premises 
unsafe, insanitary, dangerous, or hazardous, the 
Authority Having Jurisdiction shall be permitted 
to enter the building or premises at all reason- 
able times to inspect or to perform the duties 
imposed upon the Authority Having Jurisdiction 
by this code, provided that if such building or 
premises is occupied, the Authority Having 
Jurisdiction shall present credentials to the occu- 
pant and request entry. If such building or 
premises is unoccupied, the Authority Having 
Jurisdiction shall first make a reasonable effort 
to locate the owner or other person having 
charge or control of the building or premises and 
request entry. If entry is refused, the Authority 
Having Jurisdiction has recourse to every 
remedy provided by law to secure entry. 

When the Authority Having Jurisdiction 
shall have first obtained a proper inspection 
warrant or other remedy provided by law to 
secure entry, no owner, occupant, or person 
having charge, care, or control of any building or 
premises shall fail or neglect, after proper 
request is made as herein provided, to promptly 
permit entry herein by the Authority Having 
Jurisdiction for the purpose of inspection and 
examination pursuant to this code. 

102.2.3 Stop Orders. Whenever any work is 
being done contrary to the provisions of this 
code, the Authority Having Jurisdiction shall be 
permitted to order the work stopped by notice in 
writing served on any persons engaged in the 
doing or causing such work to be done, and any 
such persons shall forthwith stop work until 
authorized by the Authority Having Jurisdiction 
to proceed with the work. 



ADMINISTRATION 



102.2-103.2 



102.2.4 Authority to Disconnect Utilities in 
Emergencies. The Authority Having Jurisdiction 
shall have the authority to disconnect a plumbing 
system to a building, structure, or equipment 
regulated by this code in case of emergency 
where necessary to eliminate an immediate 
hazard to life or property. 

102.2.5 Authority to Condemn. Whenever the 
Authority Having Jurisdiction ascertains that 
any plumbing system or portion thereof, 
regulated by this code, has become hazardous to 
life, health, or property, or has become insani- 
tary, the Authority Having Jurisdiction shall 
order in writing that such plumbing either be 
removed or placed in a safe or sanitary condi- 
tion, as appropriate. The order shall fix a reason- 
able time limit for compliance. No person shall 
use or maintain defective plumbing after 
receiving such notice. 

When such plumbing system is to be 
disconnected, written notice shall be given. In 
cases of immediate danger to life or property, 
such disconnection shall be permitted to be 
made immediately without such notice. 

102.2.6 Liability. The Authority Having Juris- 
diction charged with the enforcement of this 
code, acting in good faith and without malice in 
the discharge of the Authority Having Jurisdiction's 
duties, shall not thereby be rendered personally 
liable for any damage that may accrue to 
persons or property as a result of any act or by 
reason of any act or omission in the discharge of 
duties. A suit brought against the Authority 
Having Jurisdiction or employee because of such 
act or omission performed in the enforcement of 
any provision of this code shall be defended by 
legal counsel provided by this jurisdiction until 
final termination of such proceedings. 

102.3 Violations and Penalties. 

102.3.1 Violations. It shall be unlawful for any 
person, firm, or corporation to erect, construct, 
enlarge, alter, repair, move, improve, remove, 
convert, demolish, equip, use, or maintain any 
plumbing or permit the same to be done in 
violation of this code. 

102.3.2 Penalties. Any person, firm, or corpora- 
tion violating any provision of this code 
shall be deemed guilty of a misdemeanor, and 
upon conviction thereof, shall be punishable by 
a fine and /or imprisonment set forth by the 
governing laws of the jurisdiction. Each separate 
day or any portion thereof, during which any 
violation of this code occurs or continues, shall 
be deemed to constitute a separate offense. 



103.0 Permits and inspections. 

103.1 Permits. 

103.1.1 Permits Required. It shall be unlawful 
for any person, firm, or corporation to make any 
installation, alteration, repair, replacement, or 
remodel any plumbing system regulated by this 
code except as permitted in Section 103.1.2, or to 
cause the same to be done without first obtaining 
a separate plumbing permit for each separate 
building or structure. 

103.1.2 Exempt Work. A permit shall not be 
required for the following: 

103.1.2.1 The stopping of leaks in drains, 
soil, waste, or vent pipe, provided, however, 
that should any trap, drainpipe, soil, waste, 
or vent pipe become defective and it 
becomes necessary to remove and replace 
the same with new material, the same shall 
be considered as new work and a permit 
shall be procured and inspection made as 
provided in this code. 

103.1.2.2 The clearing of stoppages, 
including the removal and reinstallation of 
water closets, or the repairing of leaks in 
pipes, valves, or fixtures, provided such 
repairs do not involve or require the replace- 
ment or rearrangement of valves, pipes, or 
fixtures, 

Exemption from the permit requirements 
of this code shall not be deemed to grant 
authorization for any work to be done in 
violation of the provisions of the code or any 
other laws or ordinances of this jurisdiction. 

103.1 .3 Licensing. Provision for licensing shall be 
determined by the Authority Having Jurisdiction. 

103.2 Application for Permit. 

103.2.1 Application. To obtain a permit, the 
applicant shall first file an application therefore 
in writing on a form furnished by the Authority 
Having Jurisdiction for that purpose. Every such 
application shall: 

103.2.1.1 Identify and describe the work to 
be covered by the permit for which applica- 
tion is made. 

103.2.1.2 Describe the land upon which the 
proposed work is to be done by legal 
description, street address, or similar 
description that will readily identify and 
definitely locate the proposed building or 
work. 

103.2.1.3 Indicate the use or occupancy for 
which the proposed work is intended. 



103.2-103.3 



UNIFORM PLUMBING CODE 



1 03.2.1 .4 Be accompanied by plans, diagrams, 
computations, and other data as required in 
Section 103.2.2. 

103.2.1.5 Be signed by the permittee or the 
permittee's authorized agent, who may be 
required to submit evidence to indicate such 
authority. 

1 03.2.1 .6 Give such other data and information 
as may be required by the Authority Having 
Jurisdiction. 

103.2.2 Plans and Specifications. Plans, engi- 
neering calculations, diagrams, and other data 
shall be submitted in one (1) or more sets with 
each application for a permit. The Authority 
Having Jurisdiction shall be permitted to require 
plans, computations, and specifications to be 
prepared by, and the plumbing designed by, an 
engineer and /or architect licensed by the state to 
practice as such. 

Exception: The Authority Having Jurisdiction 
shall be permitted to waive the submission 
of plans, calculations, or other data if the 
Authority Having Jurisdiction finds that the 
nature of the work applied for is such that 
reviewing of plans is not necessary to obtain 
compliance within the code. 

103.2.3 Information on Plans and Specifications. 

Plans and specifications shall be drawn to scale 
upon substantial paper or cloth and shall be of 
sufficient clarity to indicate the location, nature, 
and extent of the work proposed and show in 
detail that it will conform to the provisions of 
this code and relevant laws, ordinances, rules, 
and regulations. 

103.3 Permit Issuance. 

103.3.1 Issuance. The application, plans, and 
specifications and other data filed by an appli- 
cant for a permit shall be reviewed by the 
Authority Having Jurisdiction. Such plans shall 
be permitted to be reviewed by other depart- 
ments of this jurisdiction to verify compliance 
with applicable laws under their jurisdiction. If 
the Authority Having Jurisdiction finds that the 
work described in an application for permit and 
the plans, specifications, and other data filed 
therewith conform to the requirements of the 
code and other pertinent laws and ordinances, 
and that the fees specified in Section 103.4 have 
been paid, the Authority Having Jurisdiction 
shall issue a permit therefore to the applicant. 

When the Authority Having Jurisdiction 
issues the permit where plans are required, the 



Authority Having Jurisdiction shall endorse in 
writing or stamp the plans and specifications 
" APPROVED/' Such approved plans and specifi- 
cations shall not be changed, modified, or altered 
without authorization from the Authority 
Having Jurisdiction, and all work shall be done 
in accordance with approved plans. 

The Authority Having Jurisdiction shall be 
permitted to issue a permit for the construction 
of a part of a plumbing system before the entire 
plans and specifications for the whole system 
have been submitted or approved, provided 
adequate information and detailed statements 
have been filed complying with all pertinent 
requirements of this code. The holder of such 
permit shall be permitted to proceed at the 
holder's risk without assurance that the permit 
for the entire building, structure, or plumbing 
system will be granted. 

103.3.2 Retention of Plans. One (1) set of 

approved plans, specifications, and computations 
shall be retained by the Authority Having Juris- 
diction until final approval of the work covered 
therein. One (1) set of approved plans and speci- 
fications shall be returned to the applicant, and 
said set shall be kept on the site of the building 
or work at times during which the work autho- 
rized thereby is in progress. 

103.3.3 Validity of Permit. The issuance of a 
permit or approval of plans and specifications 
shall not be construed to be a permit for, or an 
approval of, any violation of any of the provi- 
sions of this code or of any other ordinance of 
the jurisdiction. No permit presuming to give 
authority to violate or cancel the provisions of 
this code shall be valid. 

The issuance of a permit based upon plans, 
specifications, or other data shall not prevent the 
Authority Having Jurisdiction from thereafter 
requiring the correction of errors in said plans, 
specifications, and other data or from preventing 
building operations being carried on thereunder 
when in violation of this code or of other ordi- 
nances of this jurisdiction. 

103.3.4 Expiration. Every permit issued by the 
Authority Having Jurisdiction under the provi- 
sions of this code shall expire by limitation and 
become null and void if the work authorized by 
such permit is not commenced within one- 
hundred and eighty (180) days from the date of 
such permit, or if the work authorized by such 
permit is suspended or abandoned at any time 
after the work is commenced for a period of one- 



ADMINISTRATION 



103.3-103.4 



hundred and eighty (180) days. Before such 
work can be recommenced, a new permit shall 
first be obtained to do so, and the fee therefore 
shall be one-half (1 /2) the amount required for a 
new permit for such work, provided no changes 
have been made or will be made in the original 
plans and specifications for such work, and 
provided further that such suspensions or aban- 
donment has not exceeded one (1) year. 

Any permittee holding an unexpired permit 
shall be permitted to apply for an extension of 
the time within which work shall be permitted 
to commence under that permit when the 
permittee is unable to commence work within 
the time required by this section for good and 
satisfactory reasons. The Authority Having 
Jurisdiction shall be permitted to extend the time 
for action by the permittee for a period not 
exceeding one-hundred and eighty (180) days 
upon written request by the permittee showing 
that circumstances beyond the control of the 
permittee have prevented action from being 
taken. No permit shall be extended more than 
once. In order to renew action on a permit after 
expiration, the permittee shall pay a new full 
permit fee. 

103.3.5 Suspension or Revocation. The 

Authority Having Jurisdiction shall be permitted 
to, in writing, suspend or revoke a permit issued 
under the provisions of this code whenever the 
permit is issued in error or on the basis of incor- 
rect information supplied or in violation of other 
ordinance or regulation of the jurisdiction. 

103.4 Fees. 

103.4.1 Permit Fees. Fees shall be assessed in 
accordance with the provisions of this section 
and as set forth in the fee schedule Table 1-1. The 
fees are to be determined and adopted by this 
jurisdiction. 

103.4.2 Plan Review Fees. When a plan or other 
data is required to be submitted by Section 
103.2.2, a plan review fee shall be paid at the time 
of submitting plans and specifications for review. 

The plan review fees for plumbing work shall 
be determined and adopted by this jurisdiction. 

The plan review fees specified in this 
subsection are separate fees from the permit fees 
specified in this section and are in addition to 
the permit fees. 

When plans are incomplete or changed so as 
to require additional review, a fee shall be 
charged at the rate shown in Table 1-1. 



103.4.3 Expiration of Plan Review. Applications 
for which no permit is issued within one- 
hundred and eighty (180) days following the 
date of application shall expire by limitation, 
plans and other data submitted for review may 
thereafter be returned to the applicant or 
destroyed by the Authority Having Jurisdiction. 
The Authority Having Jurisdiction shall be 
permitted to exceed the time for action by the 
applicant for a period not to exceed one- 
hundred and eighty (180) days upon request by 
the applicant showing that circumstances 
beyond the control of the applicant have 
prevented action from being taken. No applica- 
tion shall be extended more than once. In order 
to renew action on an application after expira- 
tion, the applicant shall resubmit plans and pay 
a new plan review fee. 

103.4.4 Investigation Fees: Work Without a 
Permit. 

103.4.4.1 Whenever any work for which a 
permit is required by this code has been 
commenced without first obtaining said 
permit, a special investigation shall be made 
before a permit may be issued for such work. 

103.4.4.2 An investigation fee, in addition 
to the permit fee, shall be collected whether 
or not a permit is then or subsequently 
issued. The investigation fee shall be equal 
to the amount of the permit fee that would 
be required by this code if a permit were to 
be issued. The payment of such investigation 
fee shall not exempt any person from compli- 
ance with other provisions of this code, nor 
from any penalty prescribed by law. 

103.4.5 Fee Refunds. 

103.4.5.1 The Authority Having Jurisdiction 
shall be permitted to authorize the refunding 
of any fee paid hereunder that was erro- 
neously paid or collected. 

103.4.5.2 The Authority Having Jurisdiction 
shall be permitted to authorize the refunding 
of not more than a percentage, as deter- 
mined by this jurisdiction when no work has 
been done under a permit issued in accor- 
dance with this code. 

1 03.4.5.3 The Authority Having Jurisdiction 
shall not authorize the refunding of any fee 
paid except upon written application filed 
by the original permittee not to exceed one- 
hundred and eighty (180) days after the date 
of fee payment. 



103.5 



UNIFORM PLUMBING CODE 



103.5 inspections. 

103.5.1 General. Plumbing systems for which a 
permit is required by this code shall be inspected 
by the Authority Having Jurisdiction. 

No portion of any plumbing system shall be 
concealed until inspected and approved. Neither 
the Authority Having Jurisdiction nor the juris- 
diction shall be liable for expense entailed in the 
removal or replacement of material required to 
permit inspection. When the installation of a 
plumbing system is complete, an additional and 
final inspection shall be made. Plumbing 
systems regulated by this code shall not be 
connected to the water, the energy fuel supply, 
or the sewer system until authorized by the 
Authority Having Jurisdiction. 

103.5.1.1 Inspection. No water supply 
system or portion thereof shall be covered or 
concealed until it first has been tested, 
inspected, and approved. 

103.5.1.2 Scope. New plumbing work and 
such portions of existing systems as may be 
affected by new work, or any changes, shall 
be inspected by the Authority Having Juris- 
diction to ensure compliance with the 
requirements of this code and to ensure that 
the installation and construction of the 
plumbing system is in accordance with 
approved plans. 

103.5.1.3 Covering or Using. No plumbing 
or drainage system, building sewer, private 
sewer disposal system, or part thereof, shall be 
covered, concealed, or put into use until it has 
been tested, inspected, and accepted as 
prescribed in this code. 

103.5.1.4 Uncovering. If any drainage or 
plumbing system, building sewer, private 
sewage disposal system, or part thereof, 
which is installed, altered, or repaired, is 
covered or concealed before being inspected, 
tested, and approved as prescribed in this 
code, it shall be uncovered for inspection 
after notice to uncover the work has been 
issued to the responsible person by the 
Authority Having Jurisdiction. 

103.5.2 Operation of Plumbing Equipment. 

The requirements of this section shall not be 
considered to prohibit the operation of any 
plumbing installed to replace existing equipment 
or fixtures serving an occupied portion of the 
building in the event a request for inspection of 
such equipment or fixture has been filed with 
the Authority Having Jurisdiction not more than 
seventy-two (72) hours after such replacement 



work is completed, and before any portion of 
such plumbing system is concealed by any 
permanent portion of the building. 

103.5.3 Testing of Systems. Plumbing systems 
shall be tested and approved as required by this 
code or the Authority Having Jurisdiction. 

103.5.3.1 Test. Tests shall be conducted in 
the presence of the Authority Having 
Jurisdiction or the Authority Having 
Jurisdiction's duly appointed representative. 

103.5.3.2 Test Waived. No test or inspection 
shall be required where a plumbing system, 
or part thereof, is set up for exhibition 
purposes and has no connection with a 
water or drainage system. 

103.5.3.3 Exceptions. In cases where it 
would be impractical to provide the required 
water or air tests, or for minor installations 
and repairs, the Authority Having Jurisdiction 
shall be permitted to make such inspection 
as deemed advisable in order to be assured 
that the work has been performed in accor- 
dance with the intent of this code. 

103.5.3.4 Tightness. Joints and connections 
in the plumbing system shall be gas-tight 
and water-tight for the pressures required 
by test. 

103.5.4 Inspection Requests. It shall be the 
duty of the person doing the work authorized by a 
permit to notify the Authority Having Jurisdiction 
that such work is ready for inspection. The 
Authority Having Jurisdiction shall be permitted 
to require that every request for inspection be filed 
not less than one (1) working day before such 
inspection is desired. Such request may be in 
writing or by telephone, at the option of the 
Authority Having Jurisdiction. 

It shall be the duty of the person requesting 
inspections required by this code to provide 
access to and means for proper inspection of 
such work. 

103.5.4.1 Advance Notice. It shall be the 
duty of the person doing the work autho- 
rized by the permit to notify the Authority 
Having Jurisdiction, orally or in writing, 
that said work is ready for inspection. Such 
notification shall be given not less than 
twenty-four (24) hours before the work is to 
be inspected. 

103.5.4.2 Responsibility. It shall be the 
duty of the holder of a permit to make sure 
that the work will stand the test prescribed 
before giving the notification. 



ADMINISTRATION 



103.5-103.7 



The equipment material, and labor 
necessary for inspection or tests shall be 
furnished by the person to whom the 
permit is issued or by whom inspection 
is requested. 

103.5.5 Other Inspections. In addition to 
the inspections required by this code, the 
Authority Having Jurisdiction shall be permitted 
to require other inspections of any plumbing 
work to ascertain compliance with the provi- 
sions of this code and other laws that are 
enforced by the Authority Having Jurisdiction. 

103.5.5.1 Defective Systems. An air test 
shall be used in testing the sanitary condition 
of the drainage or plumbing system of any 
building premises when there is reason to 
believe that it has become defective. In 
buildings or premises condemned by the 
proper Authority Having Jurisdiction 
because of an insanitary condition of the 
plumbing system or part thereof, the 
alterations in such system shall conform to 
the requirements of this code. 

103.5.5.2 Moved Structures. Parts of the 
plumbing systems of any building or part 
thereof that is moved from one (1) founda- 
tion to another, or from one (1) location to 
another, shall be completely tested as 
prescribed elsewhere in this section for new 
work, except that walls or floors need not be 
removed during such test when other equiv- 
alent means of inspection acceptable to the 
Authority Having Jurisdiction are provided. 

103.5.6 Reinspections. A reinspection fee 
shall be permitted to be assessed for each inspec- 
tion or reinspection when such portion of work 
for which inspection is called is not complete or 
when required corrections have not been made. 

This provision is not to be interpreted as 
requiring reinspection fees the first time a job is 
rejected for failure to comply with the require- 
ments of this code, but as controlling the practice 
of calling for inspections before the job is ready 
for inspection or reinspection. 

Reinspection fees shall be permitted to be 
assessed when the approved plans are not 
readily available to the inspector, for failure to 
provide access on the date for which the inspec- 
tion is requested, or for deviating from plans 
requiring the approval of the Authority Having 
Jurisdiction. 

To obtain reinspection, the applicant shall 
file an application therefore in writing upon a 



form furnished for that purpose and pay the 
reinspection fee in accordance with Table 1-1. 

In instances where reinspection fees have 
been assessed, no additional inspection of the 
work will be performed until the required fees 
have been paid. 

103.5.6.1 Corrections. Notices of correction 
or violation shall be written by the 
Authority Having Jurisdiction and shall be 
permitted to be posted at the site of the 
work or mailed or delivered to the permittee 
or his authorized representative. 

Refusal, failure, or neglect to comply 
with any such notice or order within ten 
(10) days of receipt thereof, shall be 
considered a violation of this code and 
shall be subject to the penalties set forth 
elsewhere in this code for violations. 

103.5.6.2 Retesting. If the Authority 
Having Jurisdiction finds that the work 
will not pass the test, necessary corrections 
shall be made, and the work shall then be 
resubmitted for test or inspection. 

103.5.6.3 Approval. Upon the satisfactory 
completion and final test of the plumbing 

• system, a certificate of approval shall be 
issued by the Authority Having Jurisdiction 
to the permittee on demand. 

103.6 Connection Approval. 

103.6.1 Energy Connections. No person shall 
make connections from a source of energy or 
fuel to any plumbing system or equipment regu- 
lated by this code and for which a permit is 
required until approved by the Authority 
Having Jurisdiction. 

103.6.2 Other Connections. No person shall 
make connection from any water-supply line nor 
shall connect to any sewer system regulated by 
this code and for which a permit is required until 
approved by the Authority Having Jurisdiction. 

103.6.3 Temporary Connections. The Authority 
Having Jurisdiction shall be permitted to autho- 
rize temporary connection of the plumbing 
equipment to the source of energy or fuel for the 
purpose of testing the equipment. 

103.7 Unconstitutional. 

103.7.1 If any section, subsection, sentence, 
clause, or phrase of this code is, for any reason, 
held to be unconstitutional, such decision shall 
not affect the validity of the remaining portions 
of this code. The Legislative body hereby 
declares that it would have passed this code, and 
each section, subsection, sentence, clause, or 



103.7-103.8 



UNIFORM PLUMBING CODE 



phrase thereof, irrespective of the fact that one 
(1) or more sections, subsections, sentences, 
clauses, and phrases are declared unconstitu- 
tional. 
103.8 Validity. 

103.8.1 If any provision of this code, or the 
application thereof to any person or circumstance, 
is held invalid, the remainder of the code, or the 
application of such provision to other persons or 
circumstances, shall not be affected thereby. 

103.8.2 Wherever in this code reference is made 
to an appendix, the provisions in the appendix 
shall not apply unless specifically adopted. 



ADMINISTRATION Table 1 -1 

TABLE 1-1 
Plumbing Permit Fees 
Permit Issuance 

1. For issuing each permit * 

2. For issuing each supplemental permit * 



Unit Fee Schedule (in addition to items 1 and 2 above) 

1 . For each plumbing fixture on one (1) trap or a set of fixtures on one (1) trap (including water, 
drainage piping, and backflow protection therefore) *_ 

2. For each building sewer and each trailer park sewer *_ 

3. Rainwater systems - per drain (inside building) *_ 

4. For each cesspool (where permitted) *_ 

5. For each private sewage disposal system *_ 

6. For each water heater and/or vent *_ 

7. For each gas piping system of one (1) to five (5) outlets *_ 

8. For each additional gas piping system outlet, per outlet ....*_ 

9. For each industrial waste pretreatment interceptor, including its trap and vent, 

except kitchen-type grease interceptors functioning as fixture traps *_ 

10. For each installation, alteration, or repair of water piping and/or water treating equipment, each ..*_ 

11. For each repair or alteration of drainage or vent piping, each fixture *_ 

12. For each lawn sprinkler system on any one (1) meter including backflow protection devices therefore* 

13. For atmospheric-type vacuum breakers not included in item 12: 

1 to 5 ...*_ 

overs, each *_ 

14. For each backflow protective device other than atmospheric-type vacuum breakers: 

2 inch (50 mm) diameter and smaller *_ 

over 2 inch (50 mm) diameter *_ 

15. For each graywater system *_ 

16. For initial installation and testing for a reclaimed water system *_ 

17. For each annual cross-connection testing of a reclaimed water system (excluding initial test) *_ 

18. For each medical gas piping system serving one (1) to five (5) inlet(s)/outlet(s) for a specific gas *_ 

19. For each additional medical gas inlet(s)/outlet(s) *_ 

Other Inspections and Fees 

1 . Inspections outside of normal business hours *_ 

2. Reinspection fee .*_ 

3. Inspections for which no fee is specifically indicated *_ 

4. Additional plan review required by changes, additions, or 

revisions to approved plans (minimum charge - one-half (1/2) hour) *_ 

* Jurisdiction will indicate their fees here. 



UNIFORM PLUMBING CODE 



10 



CHAPTER 2 

DEFINITIONS 



201.0 General. 

For the purpose of this code, the following terms 
have the meanings indicated in this chapter. 

No attempt is made to define ordinary words, 
which are used in accordance with their established 
dictionary meanings, except where a word has been 
used loosely and it is necessary to define its meaning 
as used in this code to avoid misunderstanding. 

The definitions of terms are arranged alphabeti- 
cally according to the first word of the term. 

202.0 Definition of Terms. 

203.0 - A - 

ABS - Acrylonitrile-butadiene-styrene. 
Accessible - When applied to a fixture, connection, 
appliance, or equipment, "accessible" means having 
access thereto, but which first may require the 
removal of an access panel, door, or similar obstruc- 
tion. ''Readily accessible" means direct access 
without the necessity of removing any panel, door, 
or similar obstruction. 

Airbreak - A physical separation which may be a 
low inlet into the indirect waste receptor from the 
fixture, appliance, or device indirectly connected. 

Airgap, Drainage - The unobstructed vertical 
distance through the free atmosphere between the 
lowest opening from any pipe, plumbing fixture, 
appliance, or appurtenance conveying waste to the 
flood-level rim of the receptor. 

Airgap, Water Distribution - The unobstructed 
vertical distance through the free atmosphere 
between the lowest opening from any pipe or faucet 
conveying potable water to the flood-level rim of any 
tank, vat, or fixture. 

Anchors - See Supports. 

Approved - Acceptable to the Authority Having 
Jurisdiction. 

Approved Testing Agency - An organization 
primarily established for purposes of testing to 
approved standards and approved by the Authority 
Having Jurisdiction. 

Area Drain - A receptor designed to collect surface 
or storm water from an open area. 

Aspirator - A fitting or device supplied with water 
or other fluid under positive pressure that passes 
through an integral orifice or constriction, causing a 
vacuum. 



Authority Having Jurisdiction - The organization, 
office, or individual responsible for enforcing the 
requirements of a code or standard, or for approving 
equipment, materials, installations, or procedures. 
The Authority Having Jurisdiction shall be a federal, 
state, local, or other regional department or an indi- 
vidual such as a plumbing official, mechanical offi- 
cial, labor department official, health department 
official, building official, or others having statutory 
authority. In the absence of a statutory authority, the 
Authority Having Jurisdiction may be some other 
responsible party. This definition shall include the 
Authority Having Jurisdiction's duly authorized 
representative. 

204.0 - B - 

Backflow - The flow of water or other liquids, 
mixtures, or substances into the distributing pipes of 
a potable supply of water from any sources other 
than its intended source. See Back-Siphonage, Back- 
Pressure Backflow. 

Backflow Connection - Any arrangement whereby 
backflow can occur. 

Back-Pressure Backflow - Backflow due to an 

increased pressure above the supply pressure, which 
may be due to pumps, boilers, gravity, or other 
sources of pressure. 

Backflow Preventer - A device or means to prevent 
backflow into the potable water system. 
Back-Siphonage - The flowing back of used, 
contaminated, or polluted water from a plumbing 
fixture or vessel into a water supply pipe due to a 
pressure less than atmospheric in such pipe. See 
Backflow. 

Backwater Valve - A device installed in a drainage 
system to prevent reverse flow. 

Bathroom Group - A group of fixtures consisting of 
a water closet, one or two lavatories, and either a 
bathtub, a combination bath /shower, or a shower 
and may include a urinal or bidet and an emergency 
floor drain. 

Bathroom, Half - A room equipped with only a 
water closet and lavatory. 

Battery of Fixtures - Any group of two (2) or more 
similar, adjacent fixtures that discharge into a 
common horizontal waste or soil branch. 

Boiler Blowoff - An outlet on a boiler to permit 
emptying or discharge of sediment. 

Branch - Any part of the piping system other than a 
main, riser, or stack. 



11 



204.0 - 205.0 



UNIFORM PLUMBING CODE 



Branch, Fixture - See Fixture Branch. 

Branch, Horizontal - See Horizontal Branch. 

Branch Vent - A vent connecting one (1) or more 
individual vents with a vent stack or stack vent. 

Building - A structure built, erected, and framed of 
component structural parts designed for the housing, 
shelter, enclosure, or support of persons, animals, or 
property of any kind. 

Building Drain - That part of the lowest piping of a 
drainage system that receives the discharge from 
soil, waste, and other drainage pipes inside the walls 
of the building and conveys it to the building sewer 
beginning two (2) feet (610 mm) outside the building 
wall 

Building Drain (Sanitary) - A building drain that 
conveys sewage only. 

Building Drain (Storm) - A building drain that 
conveys storm water or other drainage, but no 
sewage. 

Building Sewer - That part of the horizontal piping 
of a drainage system that extends from the end of the 
building drain and that receives the discharge of the 
building drain and conveys it to a public sewer, 
private sewer, private sewage disposal system, or 
other point of disposal. 

Building Sewer (Combined) - A building sewer 
that conveys both sewage and storm water or other 
drainage. 

Building Sewer (Sanitary) - A building sewer that 

conveys sewage only. 

Building Sewer (Storm) - A building sewer that 

conveys storm water or other drainage, but no 

sewage. 

Building Subdrain - That portion of a drainage 

system that does not drain by gravity into the 

building sewer. 

Building Supply - The pipe carrying potable water 
from the water meter or other source of water supply 
to a building or other point of use or distribution on 
the lot. Building supply shall also mean water service. 

205.0 - C - 

Certified Backflow Assembly Tester - A person 
who has shown competence to test and maintain 
backflow assemblies to the satisfaction of the 
Authority Having Jurisdiction. 

Cesspool - A lined excavation in the ground that 
receives the discharge of a drainage system or part 
thereof, so designed as to retain the organic matter 
and solids discharging therein, but permitting the 
liquids to seep through the bottom and sides. 

Chemical Waste - See Special Wastes. 

Ciarifier - See Interceptor. 



Clear Water Waste - Cooling water and condensate 
drainage from refrigeration and air-conditioning 
equipment; cooled condensate from steam heating 
systems; and cooled boiler blowdown water. 

Clinic Sink - A sink designed primarily to receive 
wastes from bedpans and having a flush rim, an inte- 
gral trap with a visible trap seal, and the same 
flushing and cleansing characteristics as a water 
closet. 

Code - A standard that is an extensive compilation 
of provisions covering broad subject matter or that is 
suitable for adoption into law independently of other 
codes and standards. 

Combination Thermostatic/Pressure Balancing 
Valve - A mixing valve that senses outlet tempera- 
ture and incoming hot and cold water pressure and 
compensates for fluctuations in incoming hot and 
cold water temperatures and /or pressures to stabi- 
lize outlet temperatures. 

Combination Waste and Vent System - A specially 
designed system of waste piping embodying the 
horizontal wet venting of one or more sinks or floor 
drains by means of a common waste and vent pipe, 
adequately sized to provide free movement of air 
above the flow line of the drain. 

Combined Building Sewer - See Building Sewer 
(Combined). 

Common - That part of a plumbing system that is so 
designed and installed as to serve more than one (1) 
appliance, fixture, building, or system. 

Conductor - A pipe inside the building that conveys 
storm water from the roof to a storm drain, 
combined building sewer, or other approved point of 
disposal. 

Confined Space - A room or space having a volume 
less than fifty (50) cubic feet per 1,000 Btu/h (1.4 
m 3 /293 W) of the aggregate input rating of all fuel- 
burning appliances installed in that space. 

Contamination - An impairment of the quality of 
the potable water that creates an actual hazard to the 
public health through poisoning or through the 
spread of disease by sewage, industrial fluids, or 
waste. Also defined as High Hazard. 

Continuous Vent - A vertical vent that is a continu- 
ation of the drain to which it connects. 
Continuous Waste - A drain connecting the 
compartments of a set of fixtures to a trap or 
connecting other permitted fixtures to a common trap. 

CPVC - Chlorinated Poly (Vinyl Chloride). 

Critical Level - The critical level (C-L or C/L) 
marking on a backflow prevention device or vacuum 
breaker is a point conforming to approved standards 
and established by the testing laboratory (usually 



12 



DEFINITIONS 



205.0-208.0 



stamped on the device by the manufacturer) that 
determines the minimum elevation above the flood- 
level rim of the fixture or receptor served at which 
the device may be installed. When a backflow 
prevention device does not bear a critical level 
marking, the bottom of the vacuum breaker, combi- 
nation valve, or the bottom of any such approved 
device shall constitute the critical level. 

Cross-Connection - Any connection or arrange- 
ment physical or otherwise, between a potable water 
supply system and any plumbing fixture or any 
tank, receptor, equipment, or device, through which 
it may be possible for nonpotable, used, unclean, 
polluted, and contaminated water, or other 
substances to enter into any part of such potable 
water system under any condition. 

206.0 - D - 

Department Having Jurisdiction - The Authority 
Having Jurisdiction, including any other law 
enforcement agency affected by any provision of 
this code, whether such agency is specifically named 
or not. 

Design Flood Elevation - The elevation of the 
"design flood/' including wave height, relative to the 
datum specified on the community's legally desig- 
nated flood hazard map. 

Developed Length - The length along the center 
line of a pipe and fittings. 

Diameter - Unless specifically stated, "diameter" is 
the nominal diameter as designated commercially. 

Domestic Sewage - The liquid and water-borne 
wastes derived from the ordinary living processes, 
free from industrial wastes, and of such character as 
to permit satisfactory disposal, without special treat- 
ment, into the public sewer or by means of a private 
sewage disposal system. 

Downspout - The rain leader from the roof to the 
building storm drain, combined building sewer, or 
other means of disposal located outside of the 
building. See Conductor and Leader. 

Drain - Any pipe that carries waste or waterborne 
wastes in a building drainage system. 

Drainage System - Includes all the piping within 
public or private premises that conveys sewage or 
other liquid wastes to a legal point of disposal, but 
does not include the mains of a public sewer system 
or a public sewage treatment or disposal plant. 

Durham System - A soil or waste system in which 
all piping is threaded pipe, tubing, or other such 
rigid construction, using recessed drainage fittings to 
correspond to the types of piping. 



207.0 



-E- 



Effective Opening - The minimum cross-sectional 
area at the point of water supply discharge measured 
or expressed in terms of (1) diameter of a circle or (2) 
if the opening is not circular, the diameter of a circle 
of equivalent cross-sectional area. (This is applicable 
also to airgap.) 

Essentially Nontoxic Transfer Fluid - Essentially 
nontoxic at practically nontoxic, Toxicity Rating Class 
1 (reference "Clinical Toxicology of Commercial 
Products" by Gosselin, Smith, Hodge, & Braddock). 

Excess Flow Valve (EFV) - A valve designed to 
activate when the fuel gas passing through it exceeds I 
a prescribed flow rate. 

Existing Work - A plumbing system or any part 
thereof that has been installed prior to the effective 
date of this code. 

208.0 - F - 

Fixture Branch - A water supply pipe between the 
fixture supply pipe and the water distributing pipe. 

Fixture Drain - The drain from the trap of a fixture to 
the junction of that drain with any other drain pipe. 

Fixture Supply - A water supply pipe connecting 
the fixture with the fixture branch. 

Fixture Unit - A quantity in terms of which the load- 
producing effects on the plumbing system of 
different kinds of plumbing fixtures are expressed on 
some arbitrarily chosen scale. 

Flammable Vapor or Fumes - The concentration of 
flammable constituents in air that exceeds 25 percent 
of its lower flammabilityiimit (LFL). 

Flood Hazard Area - The greater of the following 
two areas: 

(1) The area within a floodplain subject to a one (1) 
percent or greater chance of flooding in any 
given year. 

(2) The area designated as a flood hazard area 
on a community's flood hazard map, or 
otherwise legally designated. 

Flood Hazard Area Subject to High Velocity Wave 
Action - Area within the flood hazard area that is 
subject to high velocity wave action, and shown on a 
Flood Insurance Rate Map or other flood hazard map 
as Zone V, VO, VE or Vl-30. 

Flood Level - See Flooded. 

Flood-Level Rim - The top edge of a receptor from 
which water overflows. 

Flooded - A fixture is flooded when the liquid 
therein rises to the flood-level rim. 

Flush Tank - A tank located above or integral with 
water closets, urinals, or similar fixtures for the 
purpose of flushing the usable portion of the fixture. 



13 



208.0-211.0 



UNIFORM PLUMBING CODE 



Flush Valve - A valve located at the bottom of a 
tank for the purpose of flushing water closets and 
similar fixtures. 

Flushometer Tank - A tank integrated within an air 
accumulator vessel that is designed to discharge a 
predetermined quantity of water to fixtures for 
flushing purposes. 

Flushometer Valve - A valve that discharges a prede- 
termined quantity of water to fixtures for flushing 
purposes and is actuated by direct water pressure. 

FOG Disposal System - A grease interceptor that 
reduces nonpetroleum fats, oils, and grease (FOG) in 
effluent by separation, mass and volume reduction. 

209.0 - G - 

Gang or Group Shower - Two (2) or more showers 
in a common area. 

Grade - The slope or fall of a line of pipe in reference 
to a horizontal plane. In drainage, it is usually 
expressed as the fall in a fraction of an inch (mm) or 
percentage slope per foot (meter) length of pipe. 

Gravity Grease Interceptor - A plumbing appurte- 
nance or appliance that is installed in a sanitary 
drainage system to intercept nonpetroleum fats, oils, 
and greases (FOG) from a wastewater discharge and is 
identified by volume, thirty (30) minute retention time, 
baffle(s), not less than two (2) compartments, a total 
volume of not less than three-hundred (300) gallons, 
and gravity separation. [These interceptors comply 
with the requirements of Chapter 10 or are designed by 
a registered professional engineer.] Gravity grease 
interceptors are generally installed outside. 
Grease Interceptor - A plumbing appurtenance or 
appliance that is installed in a sanitary drainage 
system to intercept nonpetroleum fats, oil, and 
greases (FOG) from a wastewater discharge. 

Grease Removal Device (GRD) - Any hydro- 
mechanical grease interceptor that automatically, 
mechanically removes non-petroleum fats, oils and 
grease (FOG) from the interceptor, the control of 
which are either automatic or manually initiated. 

210.0 -H- 

Hangers - See Supports. 

High Hazard - See Contamination. 

Horizontal Branch - A drain pipe extending later- 
ally from a soil or waste stack or building drain with 
or without vertical sections or branches, which 
receives the discharge from one (1) or more fixture 
drains and conducts it to the soil or waste stack or to 
the building drain. 



Horizontal Pipe - Any pipe or fitting that is installed 
in a horizontal position or which makes an angle of 
less than forty-five (45) degrees with the horizontal. 

Hot Water - Water at a temperature exceeding or 
equal to 120°F (49°C). 

House Drain - See Building Drain. 

House Sewer - See Building Sewer. 

Hydromechanical Grease Interceptor - A 

plumbing appurtenance or appliance that is installed 
in a sanitary drainage system to intercept 
nonpetroleum fats, oil, and grease (FOG) from a 
wastewater discharge and is identified by flow rate, 
and separation and retention efficiency. The design 
incorporates air entrainment, hydromechanical sepa- 
ration, interior baffling, and /or barriers in combina- 
tion or separately, and one of the following: 

A - External flow control, with air intake (vent): 
directly connected 

B - External flow control, without air intake (vent): 
directly connected 

C - Without external flow control, directly connected 
D - Without external flow control, indirectly 
connected 

[These interceptors comply with the requirements of 
Table 10-2.] Hydromechanical grease interceptors are 
generally installed inside. 

211.0 -5- 

Indirect Waste Pipe - A pipe that does not connect 
directly with the drainage system but conveys liquid 
wastes by discharging into a plumbing fixture, inter- 
ceptor, or receptacle that is directly connected to the 
drainage system. 

Individual Vent - A pipe installed to vent a fixture 
trap and that connects with the vent system above 
the fixture served or terminates in the open air. 

Industrial Waste - Any and all liquid or water- 
borne waste from industrial or commercial 
processes, except domestic sewage. 

Insanitary - A condition that is contrary to sanitary 
principles or is injurious to health. 

Conditions to which "insanitary" shall apply 
include the following: 

(1) Any trap that does not maintain a proper trap 
seal. 

(2) Any opening in a drainage system, except 
where lawful, that is not provided with an 
approved liquid-sealed trap. 



T: 

TIA 



14 



DEFINITIONS 



211.0-216.0 



(3) Any defective fixture, trap, pipe, or fitting. 

(4) Any trap, except where in this code exempted, 
directly connected to a drainage system, the seal 
of which is not protected against siphonage and 
back-pressure by a vent pipe. 

(5) Any connection, cross-connection, construction, or 
condition, temporary or permanent, that would 
permit or make possible by any means whatsoever 
for any unapproved foreign matter to enter a water 
distribution system used for domestic purposes. 

(6) The foregoing enumeration of conditions to 
which the term "insanitary" shall apply, shall 
not preclude the application of that term to 
conditions that are, in fact, insanitary. 

Interceptor (Ciarifier) - A device designed and 
installed so as to separate and retain deleterious, 
hazardous, or undesirable matter from normal 
wastes and permit normal sewage or liquid wastes to 
discharge into the disposal terminal by gravity. 

Invert - The lowest portion of the inside of a hori- 
zontal pipe. 



212.0 



-J- 



Joint, Brazed - Any joint obtained by joining of 
metal parts with alloys that melt at temperatures 
exceeding 840°F (449°C), but less than the melting 
temperature of the parts to be joined. 

Joint, Soldered - A joint obtained by the joining of 
metal parts with metallic mixtures or alloys that melt at 
a temperature up to and including 840°F (449°C). 



213.0 

No definitions 

214.0 



K- 



L- 



Labeled - Equipment or materials bearing a label of 
a listing agency (accredited conformity assessment 
body). See Listed (third-party certified). 

Lavatories in Sets - Two (2) or three (3) lavatories 
that are served by one (1) trap. 

Leader - An exterior vertical drainage pipe for 
conveying storm water from roof or gutter drains. 
See Downspout. 

Liquid Waste - The discharge from any fixture, 
appliance, or appurtenance in connection with a 
plumbing system that does not receive fecal matter. 

Listed (Third-party certified) - Equipment or mate- 
rials included in a list published by a listing agency 
(accredited conformity assessment body) that main- 
tains periodic inspection on current production of 



listed equipment or materials and whose listing 
states either that the equipment or material complies 
with approved standards or has been tested and 
found suitable for use in a specified manner. 

Listing Agency - An agency accredited by an inde- 
pendent and authoritative conformity assessment 
body to operate a material and product listing and 
labeling (certification) system and that is accepted by 
the Authority Having Jurisdiction, which is in the 
business of listing or labeling. The system includes 
initial and ongoing product testing, a periodic 
inspection on current production of listed (certified) 
products, and makes available a published report of 
such listing in which specific information is included 
that the material or product conforms to applicable 
standards and found safe for use in a specific 
manner. 

Lot - A single or individual parcel or area of land 
legally recorded or validated by other means accept- 
able to the Authority Having Jurisdiction on which is 
situated a building or which is the site of any work 
regulated by this code, together with the yards, 
courts, and unoccupied spaces legally required for 
the building or works, and that is owned by or is in 
the lawful possession of the owner of the building or 
works. 

Low Hazard - See Pollution. 



215.0 



-M 



Macerating Toilet System - A system comprised of 
a sump with macerating pump and with connections 
for a water closet and other plumbing fixtures, which 
is designed to accept, grind, and pump wastes to an 
approved point of discharge. 

Main - The principal artery of any system of continuous 
piping to which branches may be connected. 

Main Sewer - See Public Sewer. 

Main Vent - The principal artery of the venting 
system to which vent branches may be connected. 

May - A permissive term. 

Mobile Home Park Sewer - That part of the hori- 
zontal piping of a drainage system that begins two 
(2) feet (610 mm) downstream from the last mobile 
home site and conveys it to a public sewer, private 
sewer, private sewage disposal system, or other 
point of disposal. 

216.0 -N- 

Nuisance - Includes, but is not limited to: 

(1) Any public nuisance known at common law or 
in equity jurisprudence. 



15 



216.0-218.0 



UNIFORM PLUMBING CODE 



(2) Whenever any work regulated by this code is 
dangerous to human life or is detrimental to 
health and property. 

(3) Inadequate or unsafe water supply or sewage 
disposal system. 

217.0 -O- 

Offset - A combination of elbows or bends in a line 
of piping that brings one (1) section of the pipe out of 
line but into a line parallel with the other section. 

Oil interceptor - See Interceptor. 



218.0 



P- 



PB - Polybutylene. 

PE - Polyethylene. 

PE-AL-PE - Polyethylene-aluminum-polyethylene. 

PEX - Cross-linked polyethylene. 

PEX-AL-PEX - Cross-linked polyethylene-aluminum- 
cross-linked polyethylene. 

Person - A natural person, his heirs, executor, 
administrators, or assigns and shall also include a 
firm, corporation, municipal or quasi-municipal 
corporation, or governmental agency. Singular 
includes plural, male includes female. 

Pipe - A cylindrical conduit or conductor 
conforming to the particular dimensions commonly 
known as "pipe size/' 

Plumbing - The business, trade, or work having to 
do with the installation, removal, alteration, or repair 
of plumbing systems or parts thereof. 

Plumbing Appliance - Any one (1) of a special class 
of devices or equipment that is intended to perform a 
special plumbing function. Its operation and /or 
control may be dependent upon one (1) or more 
energized components, such as motors, controls, 
heating elements, or pressure- or temperature- 
sensing elements. Such device or equipment may 
operate automatically through one (1) or more of the 
following actions: a time cycle, a temperature range, 
a pressure range, a measured volume or weight; or 
the device or equipment may be manually adjusted 
or controlled by the user or operator. 

Plumbing Appurtenance - A manufactured device, 
a prefabricated assembly, or an on-the-job assembly 
of component parts that is an adjunct to the basic 
piping system and plumbing fixtures. An appurte- 
nance demands no additional water supply, nor does 
it add any discharge load to a fixture or the drainage 
system. It performs some useful function in the op- 
eration, maintenance, servicing, economy, or safety 
of the plumbing system. 



Plumbing Fixture - An approved-type installed 
receptacle, device, or appliance that is supplied with 
water or that receives liquid or liquid -borne wastes 
and discharges such wastes into the drainage system 
to which it may be directly or indirectly connected. 
Industrial or commercial tanks, vats, and similar 
processing equipment are not plumbing fixtures, but 
may be connected to or discharged into approved 
traps or plumbing fixtures when and as otherwise 
provided for elsewhere in this code. 

Plumbing Official - See Authority Having Jurisdic- 
tion. 

Plumbing System - Includes all potable water, 
building supply, and distribution pipes; all 
plumbing fixtures and traps; all drainage and vent 
pipes; and all building drains and building sewers, 
including their respective joints and connections, 
devices, receptors, and appurtenances within the 
property lines of the premises and shall include 
potable water piping, potable water treating or using 
equipment, medical gas and medical vacuum 
systems, liquid and fuel gas piping, and water 
heaters and vents for same. 

Pollution - An impairment of the quality of the 
potable water to a degree that does not create a 
hazard to the public health but which does adversely 
and unreasonably affect the aesthetic qualities of 
such potable water for domestic use. Also defined as 
Low Hazard. 

Potable Water - Water that is satisfactory for 
drinking, culinary, and domestic purposes and that 
meets the requirements of the Health Authority 
Having Jurisdiction. 

PP - Polypropylene. 

Pressure - The normal force exerted by a homoge- 
neous liquid or gas, per unit of area, on the wall of 
the container. 

Static Pressure - The pressure existing without 
any flow. 

Residual Pressure - The pressure available at 
the fixture or water outlet after allowance is 
made for pressure drop due to friction loss, 
head, meter, and other losses in the system 
during maximum demand periods. 

Pressure-Balancing Valve - A mixing valve that 
senses incoming hot and cold water pressures and 
compensates for fluctuations in either to stabilize 
outlet temperature. 

Private or Private Use - Applies to plumbing 
fixtures in residences and apartments, to private 
bathrooms in hotels and hospitals, and to restrooms 
in commercial establishments where the fixtures are 
intended for the use of a familv or an individual. 



16 



DEFINITIONS 



218.0-221.0 



Private Sewage Disposal System - A septic tank 

with the effluent discharging into a subsurface 
disposal field, into one (1) or more seepage pits, or 
into a combination of subsurface disposal field and 
seepage pit or of such other facilities as may be 
permitted under the procedures set forth elsewhere 
in this code. 

Private Sewer - A building sewer that receives the 
discharge from more than one (1) building drain and 
conveys it to a public sewer, private sewage disposal 
system, or other point of disposal. 

I Public or Public Use - Applies to plumbing fixtures 
that are not defined as private or private use. 

Public Sewer - A common sewer directly controlled 
by public authority. 

PVC - Polyvinyl chloride). 

PVDF - Polyvinylidene Fluoride. 

219.0 -Q- 

No definitions 

220.0 - R - 

Receptor - An approved plumbing fixture or device 
of such material, shape, and capacity as to 
adequately receive the discharge from indirect waste 
pipes, so constructed and located as to be readily 
cleaned. 

Regulating Equipment - Includes all valves and 

controls used in a plumbing system that are required 
to be accessible or readily accessible. 

Relief Vent - A vent, the primary function of which 
is to provide circulation of air between drainage and 
vent systems or to act as an auxiliary vent on a 
specially designed system. 

Remote Outlet - When used for sizing water piping, 
it is the furthest outlet dimension, measuring from 
the meter, either the developed length of the cold- 
water piping or through the water heater to the 
furthest outlet on the hot-water piping. 
Rim - See Flood-Level Rim. 

Riser - A water supply pipe that extends vertically 
one (1) full story or more to convey water to 
branches or fixtures. 

Roof Drain - A drain installed to receive water 
collecting on the surface of a roof and to discharge it 
into a leader, downspout, or conductor. 

Roughing-ln - The installation of all parts of the 
plumbing system that can be completed prior to the 
installation of fixtures. This includes drainage, water 
supply, gas piping, vent piping, and the necessary 
fixture supports. 



221.0 



-S- 



Sand Interceptor - See Interceptor. 

SDR - An abbreviation for "standard dimensional 
ratio/' which is the specific ratio of the average speci- 
fied outside diameter to the minimum wall thickness 
for outside controlled diameter plastic pipe. 

Seepage Pit - A lined excavation in the ground 
which receives the discharge of a septic tank so 
designed as to permit the effluent from the septic 
tank to seep through its bottom and sides. 
Septic Tank - A water-tight receptacle that receives 
the discharge of a drainage system or part thereof, 
designed and constructed so as to retain solids, 
digest organic matter through a period of detention, 
and allow the liquids to discharge into the soil 
outside of the tank through a system of open joint 
piping or a seepage pit meeting the requirements of 
this code. 

Sewage - Any liquid waste containing animal or 
vegetable matter in suspension or solution and that 
may include liquids containing chemicals in solution. 

Sewage Ejector - A device for lifting sewage by 
entraining it on a high-velocity jet stream, air, or 
water. 

Sewage Pump - A permanently installed mechan- 
ical device, other than an ejector, for removing 
sewage or liquid waste from a sump. 

Shall - Indicates a mandatory requirement. 

Shielded Coupling - An approved elastomeric 
sealing gasket with an approved outer shield and a 
tightening mechanism. 

Shock Arrester - See Water Hammer Arrester. 

Should - Indicates a recommendation or that which 
is advised but not required. 

Single-Family Dwelling - A building designed to be 
used as a home by the owner of such building, which 
shall be the only dwelling located on a parcel of 
ground with the usual accessory buildings. 

Size and Type of Tubing - See Diameter. 

Slip Joint - An adjustable tubing connection, 
consisting of a compression nut, a friction ring, and a 
compression washer, designed to fit a threaded 
adapter fitting or a standard taper pipe thread. 

Slope - See Grade. 

Soil Pipe - Any pipe that conveys the discharge of 
water closets, urinals, clinic sinks, or fixtures 
having similar functions of collection and removal 
of domestic sewage, with or without the discharge 
from other fixtures, to the building drain or 
building sewer. 

Special Wastes - Wastes that require some special 
method of handling, such as the use of indirect waste 



17 



221.0-225.0 



UNIFORM PLUMBING CODE 



piping and receptors, corrosion-resistant piping, 
sand, oil or grease interceptors, condensers, or other 
pretreatment facilities. 

Stack - The vertical main of a system of soil, 
waste, or vent piping extending through one (1) or 
more stories. 

Stack Vent ~ The extension of a soil or waste stack 
above the highest horizontal drain connected to 
the stack. 

Standard - A document, the main text of which 
contains only mandatory provisions using the 
word "shall' 1 to indicate requirements and which is 
in a form generally suitable for mandatory refer- 
ence by another standard or code or for adoption 
into law. Nonmandatory provisions shall be 
located in an appendix, footnote, or fine print note 
and are not to be considered a part of the require- 
ments of a standard. 

Storm Drain - See Building Drain (Storm). 

Storm Sewer - A sewer used for conveying rain- 
water, surface water, condensate, cooling water, or 
similar liquid wastes. 

Subsoil Drain - A drain that collects subsurface or 
seepage water and conveys it to a place of disposal. 

Sump - An approved tank or pit that receives 
sewage or liquid waste and which is located below 
the normal grade of the gravity system and which 
must be emptied by mechanical means. 

Supports - Supports, hangers, and anchors are 
devices for properly supporting and securing pipe, 
fixtures, and equipment. 

222.0 - T - 

Tailpiece - The pipe or tubing that connects the 
outlet of a plumbing fixture to a trap. 

Thermostatic (Temperature Control) Valve - A 

mixing valve that senses outlet temperature and 
compensates for fluctuations in incoming hot or cold 
water temperatures. 

Trap - A fitting or device so designed and 
constructed as to provide, when properly vented, a 
liquid seal that will prevent the back passage of air 
without materially affecting the flow of sewage or 
wastewater through it. 

Trap Arm - That portion of a fixture drain between a 
trap and the vent. 

Trap Primer - A device and system of piping that 
maintains a water seal in a remote trap. 

Trap Seal - The vertical distance between the crown 
weir and the top dip of the trap. 

Crown Weir (Trap Weir) -The lowest point in 
the cross-section of the horizontal waterway at 
the exit of the trap. 



Top Dip (of trap) - The highest point in the 
internal cross-section of the trap at the lowest 
part of the bend (inverted siphon). By contrast, 
the bottom dip is the lowest point in the internal 
cross-section. 



223.0 



-U- 



Unconfined Space - A room or space having a 
volume equal to not less than fifty (50) cubic feet per 
1,000 Btu/h (1.4 m 3 /293 W) of the aggregate input 
rating of all fuel-burning appliances installed in that 
space. Rooms communicating directly with the space 
in which the appliances are installed, through open- 
ings not furnished with doors, are considered a part 
of the unconfined space. 

Unsanitary - See Insanitary. 



224.0 



_V- 



Vacuum - Any pressure less than that exerted by the 
atmosphere. 

Vacuum Breaker - See Backflow Preventer. 

Vacuum Relief Valve - A device that prevents 
excessive vacuum in a pressure vessel. 

Vent - Any pipe provided to ventilate a plumbing 
system, to prevent trap siphonage and back-pres- 
sure, or to equalize the air pressure within the 
drainage system. 

Vent Pipe - See Vent. 

Vent Stack - The vertical vent pipe installed 
primarily for the purpose of providing circulation of 
air to and from any part of the drainage system. 

Vent System - A pipe or pipes installed to provide a 
flow of air to or from a drainage system or to 
provide a circulation of air within such system to 
protect trap seals from siphonage and back-pressure. 

Vented Flow Control Device - A device installed 
upstream from the hydromechanical grease inter- 
ceptor having an orifice that controls the rate of flow 
through the interceptor, and an air intake (vent) 
downstream from the orifice, which allows air to be 
drawn into the flow stream. 

Vertical Pipe - Any pipe or fitting that is installed in 
a vertical position or that makes an angle of not more 
than 45 degrees with the vertical. 

225.0 - W - 

Wall-Hung Water Closet - A water closet installed 
in such a way that no part of the water closet touches 
the floor. 

Waste - See Liquid Waste and Industrial Waste. 
Waste Pipe - A pipe that conveys only liquid waste, 
free of fecal matter. 



18 



DEFINITIONS 225.0-228.0 

Water-Conditioning or Treating Device - A device 
that conditions or treats a water supply so as to 
change its chemical content or remove suspended 
solids by filtration. 

Water-Distributing Pipe - In a building or premises, 
a pipe that conveys potable water from the building 
supply pipe to the plumbing fixtures and other 
water outlets. 

Water Hammer Arrester - A device designed to 
provide protection against hydraulic shock in the 
building water supply system. 

Water Main (Street Main) - A water supply pipe for 
public or community use. 

Water Supply System - The building supply pipe, 
the water-distributing pipes, and the necessary 
connecting pipes, fittings, control valves, backflow 
prevention devices, and all appurtenances carrying 
or supplying potable water in or adjacent to the 
building or premises. 

Welded Joint or Seam - Any joint or seam obtained 
by the joining of metal parts in the plastic molten 
state. 

Welder, Pipe - A person who specializes in the 
welding of pipes and holds a valid certificate of 
competency from a recognized testing laboratory, 
based on the requirements of the ASME Boiler and 
Pressure Vessels code, Section IX. 

Wet Vent - A vent that also serves as a drain. 

Whirlpool Bathtub - A bathtub fixture equipped 
and fitted with a circulating piping system designed 
to accept, circulate, and discharge bathtub water 
upon each use. 

226.0 - X - 

No definitions. 

227.0 - Y - 

Yoke Vent - A pipe connecting upward from a soil 
or waste stack to a vent stack for the purpose of 
preventing pressure changes in the stacks. 

228.0 - Z - 

No definitions. 



19 



UNIFORM PLUMBING CODE 



20 



CHAPTER 3 

GENERAL REGULATIONS 



301 .0 Materials - Standards and Alternates. 

301.1 Minimum Standards. 

301.1.1 Approvals. All pipe, pipe fittings, 
traps, fixtures, material, and devices used in a 
plumbing system shall be listed or labeled 
(third-party certified) by a listing agency 
(accredited conformity assessment body) and 
shall conform to approved applicable recognized 
standards referenced in this code, and shall be 
free from defects. Unless otherwise provided for 
in this code, all materials, fixtures, or devices 
used or entering into the construction of 
plumbing systems, or parts thereof, shall be 
submitted to the Authority Having Jurisdiction 
for approval. 

301.1.2 Marking. Each length of pipe and each 
pipe fitting, trap, fixture, material, and device 
used in a plumbing system shall have cast, 
stamped, or indelibly marked on it the manufac- 
turer's mark or name, which shall readily identify 
the manufacturer to the end user of the product. 
When required by the approved standard that 
applies, the product shall be marked with the 
weight and the quality of the product. Materials 
and devices used or entering into the construction 
of plumbing and drainage systems, or parts 
thereof, shall be marked and identified in a 
manner satisfactory to the Authority Having 
Jurisdiction. Such marking shall be done by the 
manufacturer. Field markings shall not be accept- 
able. 

301.1.3 Standards. Standards listed or referred 
to in this chapter or other chapters cover mate- 
rials that will conform to the requirements of this 
code, when used in accordance with the limita- 
tions imposed in this or other chapters thereof 
and their listing. Where a standard covers mate- 
rials of various grades, weights, quality, or 
configurations, there may be only a portion of 
the listed standard that is applicable. Design and 
materials for special conditions or materials not 
provided for herein shall be permitted to be 
used only by special permission of the Authority 
Having Jurisdiction after the Authority Having 
Jurisdiction has been satisfied as to their 
adequacy. A list of accepted plumbing materials 
standards is included in Table 14-1. IAPMO 
Installation Standards are included in Appendix 
I for the convenience of the users of this code. 
They are not considered as a part of this code 
unless formally adopted as such by the 
Authority Having Jurisdiction. 



301.1.4 Existing Buildings. In existing buildings 
or premises in which plumbing installations are 
to be altered, repaired, or renovated, the 
Authority Having Jurisdiction has discretionary 
powers to permit deviation from the provisions 
of this code, provided that such proposal to 
deviate is first submitted for proper determina- 
tion in order that health and safety require- 
ments, as they pertain to plumbing, shall be 
observed. 

301.2 Alternate Materials and Methods of 
Construction Equivalency. Nothing in this code is 
intended to prevent the use of systems, methods, or 
devices of equivalent or superior quality, strength, 
fire resistance, effectiveness, durability, and safety 
over those prescribed by this code. Technical docu- 
mentation shall be submitted to the Authority Having 
Jurisdiction to demonstrate equivalency. The 
Authority Having Jurisdiction shall have the 1 
authority to approve or disapprove the system, I 
method or device for the intended purpose. 1 

However, the exercise of this discretionary 
approval by the Authority Having Jurisdiction shall 
have no effect beyond the jurisdictional boundaries 
of said Authority Having Jurisdiction. Any alternate 
material or method of construction so approved shall 
not be considered as conforming to the requirements 
and / or intent of this code for any purpose other than 
that granted by the Authority Having Jurisdiction 
when the submitted data does not prove equivalency. 
301.2.1 Testing. The Authority Having Jurisdic- 
tion shall have the authority to require tests, as 
proof of equivalency. 

301.2.1.1 Tests shall be made in accordance 
with approved or applicable standards, by an I 
approved testing agency at the expense of the 
applicant. In the absence of such standards, 
the Authority Having Jurisdiction shall have 
the authority to specify the test procedure. 

301.2.1.2 The Authority Having Jurisdiction 
shall have the authority to require tests to be 
made or repeated if, at any time, there is 
reason to believe that any material or device 
no longer conforms to the requirements on 
which its approval was based. 

301.3 Flood Hazard Resistance. 

301,3.1 General. Plumbing systems shall be 
located above the design flood elevation. 

Exception: Plumbing systems are permitted 
to be located below the design flood eleva- 
tion provided that the systems are designed 



21 



301.3-305.3 



UNIFORM PLUMBING CODE 



and installed to prevent water from entering 
or accumulating within their components 
and the systems are constructed to resist 
hydrostatic and hydrodynamic loads and 
stresses, including the effects of buoyancy, 
during the occurrence of flooding to the 
design flood elevation. 

301.3.2 Flood Hazard Areas Subject to High- 
Velocity Wave Action. Plumbing systems in 
buildings located in flood hazard areas subject to 
high-velocity wave action shall meet the require- 
ments of Section 301.3.1, and plumbing systems, 
pipes, and fixtures shall not be mounted on or 
penetrate through walls that are intended to 
breakaway under flood loads as required by the 
Building Code. 
301.4 Alternative Engineered Design. 

301.4.1 Design Criteria. An alternative engi- 
neered design shall conform to the intent of the 
provisions of this code and shall provide an 
equivalent level of quality, strength, effective- 
ness, fire resistance, durability, and safety. Mate- 
rial, equipment, or components shall be 
designed and installed in accordance with the 
manufacturer's installation instructions. 

301.4.2 Permit Application. The registered 
professional engineer shall indicate on the design 
documents that the plumbing system, or parts 
thereof, is an alternative engineered design so 
that it is noted on the construction permit appli- 
cation. The permit and permanent permit records 
shall indicate that an alternative engineered 
design was part of the approved installation. 

301.4.3 Technical Data. The registered profes- 
sional engineer shall submit sufficient technical 
data to substantiate the proposed alternative 
engineered design and to prove that the perfor- 
mance meets the intent of this code. 

301.4.4 Design Documents. The registered 
professional engineer shall provide two (2) 
complete sets of signed and sealed design docu- 
ments for the alternative engineered design for 
submittal to the Authority Having Jurisdiction. 
The design documents shall include floor plans 
and a riser diagram of the work. Where appro- 
priate, the design documents shall indicate the 
direction of flow, pipe sizes, grade of horizontal 
piping, loading, and location of fixtures and 
appliances. 

301.4.5 Design Approval. Any approval of an 
alternative engineered design shall be at the 
discretion of the Authority Having Jurisdiction. 
The exercise of this discretionary approval by the 
Authority Having Jurisdiction shall have no 
effect beyond the jurisdictional boundaries of 



said Authority Having Jurisdiction. Any alterna- 
tive engineered design so approved shall not be 
considered as conforming to the requirements 
and /or intent of this code for any purpose other 
than that granted by the Authority Having Juris- 
diction. 

301.4.6 Design Review. The Authority Having 
Jurisdiction shall have the authority to require 
testing of the alternative engineered design in 
accordance to Section 301.2.1, including the 
authority to require an independent review of the 
design documents by a registered professional 
engineer selected by the Authority Having Juris- 
diction and at the expense of the applicant. 

301.4.7 Inspection and Testing. The alternative 
engineered design shall be tested and inspected 
in accordance with the submitted testing and 
inspection plan and the requirements of this code. 

302.0 Iron Pipe Size (IPS) Pipe. 

Iron, steel, brass, and copper pipe shall be standard- 
weight iron pipe size (IPS) pipe. 

303.0 Disposal of Liquid Waste. 

It shall be unlawful for any person to cause, suffer, or 
permit the disposal of sewage, human excrement, or 
other liquid wastes, in any place or manner, except 
through and by means of an approved drainage 
system, installed and maintained in accordance with 
the provisions of this code. 

304.0 Connections to Plumbing System Required. 

Plumbing fixtures, drains, appurtenances, and appli- 
ances, used to receive or discharge liquid wastes or 
sewage, shall be connected properly to the drainage 
system of the building or premises, in accordance 
with the requirements of this code. 

305.0 Sewers Required. 

305.1 Every building in which plumbing fixtures are 
installed shall have a connection to a public or private 
sewer except as provided in Section 305.2. 

305.2 When a public sewer is not available for use, 
drainage piping from buildings and premises shall 
be connected to an approved private sewage 
disposal system. 

305.3 In cities and /or counties where the installation 
of building sewers is under the jurisdiction of a 
department other than the Authority Having Jurisdic- 
tion, the provisions of this code relating to building 
sewers need not apply. 



22 



GENERAL REGULATIONS 



306.0-311.8 



306.0 Damage to Drainage System or Public Sewer. 

306.1 It shall be unlawful for any person to deposit, 
by any means whatsoever, into any plumbing fixture, 
floor drain, interceptor, sump, receptor, or device, 
which is connected to any drainage system, public 
sewer, private sewer, septic tank, or cesspool, any 
ashes; cinders; solids; rags; inflammable, poisonous, 
or explosive liquids or gases; oils; grease; or any 
other thing whatsoever that would, or could, cause 
damage to the drainage system or public sewer. 

306.2 Roofs, inner courts, vent shafts, light wells, or 
similar areas having rainwater drain, shall discharge 
to the outside of the building or to the gutter and 
shall not be connected to the sanitary drainage 
system unless first approved by the Authority 
Having Jurisdiction. 

307.0 Industrial Wastes. 

307.1 Wastes detrimental to the public sewer system 
or detrimental to the functioning of the sewage treat- 
ment plant shall be treated and disposed of as found 
necessary and directed by the Authority Having 
Jurisdiction. 

307.2 Sewage or other waste from a plumbing 
system that may be deleterious to surface or subsur- 
face waters shall not be discharged into the ground 
or into any waterway unless it has first been 
rendered safe by some acceptable form of treatment 
as required by the Authority Having Jurisdiction. 

308.0 Location. 

308.1 Except as otherwise provided in this code, no 
plumbing system, drainage system, building sewer, 
private sewage disposal system, or parts thereof 
shall be located in any lot other than the lot that is 
the site of the building, structure, or premises served 
by such facilities. 

308.2 No subdivision, sale, or transfer of ownership 
of existing property shall be made in such manner 
that the area, clearance, and access requirements of 
this code are decreased. 

309.0 Improper Location. 

Piping, fixtures, or equipment shall not be so located 
as to interfere with the normal use thereof or with 
the normal operation and use of windows, doors, or 
other required facilities. 

310.0 Workmanship. 

310.1 Design, construction, and workmanship shall 
be in conformity with accepted engineering practices 
and shall be of such character as to secure the results 
sought to be obtained by this code. 



310.2 It is unlawful to conceal cracks, holes, or other 
imperfections in materials by welding, brazing, or 
soldering or by using therein or thereon any paint, 
wax, tar, solvent cement, other leak-sealing or repair I 
agent. 

310.3 Burred ends of pipe and tubing shall be 
reamed to the full bore of the pipe or tube, and chips 
shall be removed. 

310.4 Installation Practices. Plumbing systems 
shall be installed in a manner conforming to this 
code, applicable standards, and the manufacturer's 
installation instructions. In instances where the code, 
applicable standards, or the manufacturer's instruc- 
tions conflict, the more stringent provisions shall 
prevail. 

311.0 Prohibited Fittings and Practices. 

311.1 No double hub fitting, single or double tee 
branch, single or double tapped tee branch, side inlet 
quarter bend, running thread, band, or saddle shall 
be used as a drainage fitting, except that a double 
hub sanitary tapped tee shall be permitted to be used 
on a vertical line as a fixture connection. 

31 1 .2 No drainage or vent piping shall be drilled 
and tapped for the purpose of making connections 
thereto, and no cast-iron soil pipe shall be threaded. 

31 1 .3 No waste connection shall be made to a closet 
bend or stub of a water closet or similar fixture. 

31 1 .4 Except as hereinafter provided in Sections 908.0, 
909.0, and 910.0, no vent pipe shall be used as a soil or 
waste pipe, nor shall any soil or waste pipe be used as 
a vent. Also, single-stack drainage and venting 
systems with unvented branch lines are prohibited. 

31 1 .5 No fitting, fixture and piping connection, 
appliance, device, or method of installation that 
obstructs or retards the flow of water, wastes, 
sewage, or air in the drainage or venting systems, in 
an amount exceeding the normal frictional resistance 
to flow, shall be used unless it is indicated as accept- 
able in this code or is approved per Section 301.1 of 
this code. The enlargement of a three (3) inch (80 
mm) closet bend or stub to four (4) inches (100 mm) 
shall not be considered an obstruction. 

311.6 Except for necessary valves, where inter- 
membering or mixing of dissimilar metals occurs, 
the point of connection shall be confined to exposed 
or accessible locations. 

31 1 .7 Valves, pipes, and fittings shall be installed in 
correct relationship to the direction of flow. 

311.8 Screwed Fittings. Screwed fittings shall be 
ABS, cast-iron, copper, copper alloy, malleable iron, 
PVC, steel, or other approved materials. Threads 
shall be tapped out of solid metal or molded in solid 
ABS or PVC. 



23 



312.0-313.12 



UNIFORM PLUMBING CODE 



312.0 Independent Systems. 

The drainage system of each new building and of new 
work installed in any existing building shall be sepa- 
rate and independent from that of any other building, 
and, when available, every building shall have an 
independent connection with a public or private 
sewer. 

Exception: Where one (1) building stands in the 
rear of another building on an interior lot, and 
no private sewer is available or can be 
constructed to the rear building through an 
adjoining court, yard, or driveway, the building 
drain from the front building shall be permitted 
to be extended to the rear building. 

313.0 Protection of Piping, Materials, and Structures. 

313.1 Piping passing under or through walls shall be 
protected from breakage. Piping passing through or 
under cinders or other corrosive materials shall be 
protected from external corrosion in an approved 
manner. Approved provisions shall be made for 
expansion of hot water piping. Voids around piping 
passing through concrete floors on the ground shall 
be appropriately sealed. 

313.2 Piping in connection with a plumbing system 
shall be so installed that piping or connections will 
not be subject to undue strains or stresses, and provi- 
sions shall be made for expansion, contraction, and 
structural settlement. No plumbing piping shall be 
directly embedded in concrete or masonry. No struc- 
tural member shall be seriously weakened or 
impaired by cutting, notching, or otherwise, as 
defined in the Building Code. 

313.3 No building sewer or other drainage piping or 
part thereof, constructed of materials other than 
those approved for use under or within a building, 
shall be installed under or within two (2) feet (610 
mm) of any building or structure, or less than one (1) 
foot (305 mm) below the surface of the ground. 

313.4 Piping subject to corrosion, erosion, or 
mechanical damage shall be protected in an 
approved manner. 

I 313.5 Protectively Coated Pipe. Protectively coated 
pipe shall be inspected and tested, and any visible 
void, damage, or imperfection to the pipe coating 
shall be repaired to comply with Section 313.0. 

313.6 No water, soil, or waste pipe shall be installed 
or permitted outside of a building or in an exterior 
wall unless, where necessary, adequate provision is 
made to protect such pipe from freezing. 

313.7 Piping penetrations of fire-resistance-rated 
walls, partitions, floors, floor /ceiling assemblies, 
roof/ ceiling assemblies, or shaft enclosures shall be 



protected in accordance with the requirements of the 
Building Code, applicable standards referenced in 
Table 14-1 and Chapter 15, "Fir estop Protection." 

313.8 Waterproofing of Openings. Joints at the roof 
around pipes, ducts, or other appurtenances shall be 
made water-tight by the use of lead, copper, galva- 
nized iron, or other approved flashings or flashing 
material. Exterior wall openings shall be made 
water-tight. Counterflashing shall not restrict the 
required internal cross-sectional area of the vent. 

313.9 Plastic and copper piping penetrating a 
framing members to within one (1) inch (25.4 mm) of 
the exposed framing shall be protected by steel nail 
plates not less than No. 18 gauge (0.0478 inches) (1.2 
mm) in thickness. The steel nail plate shall extend 
along the framing member not less than one and 
one-half (1-1/2) inches (38 mm) beyond the outside 
diameter of the pipe or tubing. 

Exception: See Section 1211.3.4. 

313.10 Sleeves. 

313.10.1 Sleeves shall be provided to protect 
piping through concrete and masonry walls and 
concrete floors. 

Exception: Sleeves shall not be required where 
openings are drilled or bored. 

313.10.2 Piping through concrete or masonry 
walls shall not be subject to any load from 
building construction. 

313.10.3 In exterior walls, annular space between 
sleeves and pipes shall be sealed and made 
water-tight, as approved by the Authority 
Having Jurisdiction. Any penetration through 
fire-resistive construction shall be in accordance 
with Section 313.7. 

313.10.4 Any pipe sleeve through a firewall shall 
have the space around the pipe completely 
sealed with an approved fire-resistive material 
in accordance with other codes. 

313.11 Any structural member weakened or 
impaired by cutting, notching, or otherwise shall be 
reinforced, repaired, or replaced so as to be left in a 
safe structural condition in accordance with the 
requirements of the Building Code. 

313.12 Ratproofing. 

313.12.1 Strainer plates on drain inlets shall be 
designed and installed so that no opening is 
exceeding one-half (1/2) inch (12.7 mm) in the 
least dimension. 

313.12.2 Meter boxes shall be constructed in 
such a manner that rats cannot enter a building 
by following the service pipes from the box into 
the building. 

313.12.3 In or on buildings where openings 
have been made in walls, floors, or ceilings for 



24 



GENERAL REGULATIONS 



313.12-316.1 



the passage of pipes, such openings shall be 
closed and protected by the installation of 
approved metal collars securely fastened to the 
adjoining structure. 

313.12.4 Tub waste openings in framed 
construction to crawl spaces at or below the first 
floor shall be protected by the installation of 
approved metal collars or metal screen securely 
fastened to the adjoining structure with no 
opening exceeding one-half (1/2) inch (12.7 mm) 
in the least dimension. 

314.0 Hangers and Supports. 

314.1 Suspended piping shall be supported at inter- 
vals not to exceed those shown in Table 3-2. 

314.2 Piping shall be supported in such a manner as 
to maintain its alignment and prevent sagging. 

314.3 Piping in the ground shall be laid on a firm 
bed for its entire length; where other support is 
otherwise provided, it shall be approved per Section 
301.0 of this code. 

314.4 Hangers and anchors shall be of sufficient 
strength to support the weight of the pipe and its 
contents. Piping shall be isolated from incompatible 
materials. 

314.5 Piping, fixtures, appliances, and appurte- 
nances shall be adequately supported in accordance 
with this code, the manufacturer's installation 
instructions, and as required by the Authority 
Having Jurisdiction. 

314.6 Hanger rod sizes shall be no smaller than 
those shown in Table 3-1. 

31 4.7 Gas piping shall be supported by metal straps 
or hooks at intervals not to exceed those shown in 
Table 12-3. 

TABLE 3-1 
Hanger Rod Sizes 



Pipe and Tube Size 


Rod Size 


Inches 


mm 


Inches 


mm 


1/2-4 


15-100 


3/8 


9.5 


5-8 


125 - 200 


1/2 


12.7 


10-12 


250 - 300 


5/8 


15.9 



315.0 Trenching, Excavation, and Backfill. 

315.1 Trenches deeper than the footing of any 
building or structure and paralleling the same shall 
be not less than 45 degrees (0.79 rad) therefrom, or as 
approved per Section 301.0 of this code. 



315.2 Tunneling and driving shall be permitted to be 
done in yards, courts, or driveways of any building 
site. Where sufficient depth is available to permit, 
tunnels shall be permitted to be used between open- 
cut trenches. Tunnels shall have a clear height of two 
(2) feet (610 mm) above the pipe and shall be limited 
in length to one-half (1/2) the depth of the trench, 
with a maximum length of eight (8) feet (2,438 mm). 
When pipes are driven, the drive pipe shall be not 
less than one (1) size larger than the pipe to be laid. 

315.3 Open Trenches. Excavations required to be 
made for the installation of a building drainage 
system or any part thereof, within the walls of a 
building, shall be open trench work and shall be 
kept open until the piping has been inspected, 
tested, and accepted. 

315.4 Excavations shall be completely backfilled as 
soon after inspection as practicable. Adequate 
precaution shall be taken to ensure proper compact- 
ness of backfill around piping without damage to 
such piping. Trenches shall be backfilled in thin 
layers to twelve (12) inches (305 mm) above the top 
of the piping with clean earth, which shall not 
contain stones, boulders, cinderfill, frozen earth, 
construction debris, or other materials that would 
damage or break the piping or cause corrosive 
action. Mechanical devices such as bulldozers, 
graders, etc., shall be permitted to then be used to 
complete backfill to grade. Fill shall be properly 
compacted. Suitable precautions shall be taken to 
ensure permanent stability for pipe laid in filled or 
made ground. 

316.0 Joints and Connections. 

316.1 Types of Joints. 

316.1.1 Threaded Joints. Threads on iron pipe 
size (IPS) pipe and fittings shall be standard 
taper pipe threads in accordance with standards 
listed in Table 14-1. Threads on tubing shall be 
approved types. Threads on plastic pipe shall be 
factory cut or molded. Threaded plastic pipe 
shall be Schedule 80 minimum wall thickness. 
Tubing threads shall conform to fine tubing 
thread standards. When a pipe joint material is 
used, it shall be applied only on male threads, 
and such materials shall be approved types, 
insoluble in water and nontoxic. Cleanout plugs 
and caps shall be lubricated with water-insol- 
uble, nonhardening material or tape. Thread 
tape or thread lubricants and sealants specifi- 
cally intended for use with plastics shall be used 
on plastic threads. Conventional pipe thread 
compounds, putty, linseed-oil-based products, 
and unknown lubricants and sealants shall not 
be used on plastic threads. 



25 



316.1 -316.2 



UNIFORM PLUMBING CODE 



316.1.2 Wiped Joints. Joints in lead pipe or 
fittings or between lead pipe or fittings and brass 
or copper pipe, ferrules, solder nipples, or traps 
shall be full-wiped joints. Wiped joints shall 
have an exposed surface on each side of a joint 
not less than three-fourths (3/4) inch (19.1 mm) 
and not less than as thick as the material being 
joined. Wall or floor flange lead-wiped joints 
shall be made by using a lead ring or flange 
placed behind the joint at the wall or floor. Joints 
between lead pipe and cast-iron, steel, or 
wrought iron shall be made by means of a 
caulking ferrule or soldering nipple. 

316.1.3 Soldered Joints. Joints in copper 
tubing shall be made by the appropriate use of 
approved copper or copper alloy fittings. 
Surfaces to be joined by soldering shall be 
cleaned bright by manual or mechanical means. 

The joints shall be properly fluxed with an 
approved-type flux and made up with approved 
solder. Solder and fluxes shall be manufactured 
to approved standards. Solders and fluxes with a 
lead content that exceeds two-tenths (0.02) of 
one (1) percent shall be prohibited in piping 
systems used to convey potable water. 

316.1.4 Flared Joints. Flared joints for soft 
copper tubing shall be made with fittings 
meeting approved standards. The tubing shall 
be reamed to the full inside diameter, resized to 
round, and expanded with a proper flaring tool. 

316.1.5 Flexible Compression Factory-Fabri- 
cated Joints. Where pipe is joined by means of 
flexible compression joints, such joints shall 
conform to approved standards and shall not be 
considered as slip joints. 

316.1.6 Solvent Cement Plastic Pipe Joints. 

Plastic pipe and fittings designed to be joined by 
solvent cementing shall comply with applicable 
standards referenced in Table 14-1. 

ABS pipe and fittings shall be cleaned and 
then joined with solvent cement(s). 

CPVC pipe and fittings shall be cleaned and 
then joined with listed primer(s) and solvent 
cement(s). 

Exception: Listed solvent cements that do not 
require the use of primer shall be permitted 
for use with CPVC pipe and fittings, manu- 
factured in accordance with ASTM D2846, 
one-half (1/2) inch (15 mm) through two (2) 
inches (50 mm) in diameter. 
PVC pipe and fittings shall be cleaned and 

joined with primer(s) and solvent cement(s). 

A solvent cement transition joint between 

ABS and PVC building drain and building sewer 

shall be made using a listed transition solvent 

cement. 



316.1.7 Brazing and Welding. Brazing and 
welding shall conform to the applicable stan- 
dard^) in Table 14-1. Only brazing alloys having 
a liquid temperature above 1,000°F (538°C) shall 
be used. Brazing on medical gas systems shall be 
performed by certified installers meeting the 
requirements of ASME Boiler and Pressure Vessel 
Code, Section IX, Welding and Brazing Qualifica- 
tions, or AWS B2.2, Standard for Brazing Procedure 
and Performance Qualifications. 

316.1.8 Pressure-Lock-Type Connection. This 
is a mechanical connection that depends on an 
internal retention device to prevent pipe or 
tubing separation. Connection is made by 
inserting the pipe or tubing into the fitting to a 
prescribed depth. 

316.1.9 Pressed Fitting. This is a mechanical 
connection for joining copper tubing that uses a 
crimping tool to affix the O-ring seal copper or 
copper alloy fitting to the tubing. The tubing 
shall be inserted into the fitting, and the crimp 
shall be made using the tool recommended by 
the manufacturer. 

316.1.10 Push-fit Fitting. A mechanical fitting 
where the connection is assembled by pushing 
the tube or pipe into the fitting and is sealed 
with an "O" ring. 

316.1.11 Heat Fusion Weld Joints. This type of 
joint is used in some thermoplastic systems to 
connect pipe to fittings or pipe lengths directly 
to one another (butt-fusion). This method of 
joining pipe to fittings includes socket-fusion, 
electro-fusion, and saddle-fusion. This method 
of welding involves the application of heat and 
pressure to the components, allowing them to 
fuse together forming a bond between the pipe 
and fitting. 

316.2 Special Joints. 

316.2.1 Copper Tubing to Screw Pipe Joints. 

Joints from copper tubing to threaded pipe shall be 
made by the use of brass adapter fittings. The joint 
between the copper tubing and the fitting shall be 
a soldered brazed flared, or pressed joint and the 
connection between the threaded pipe and the 
fitting shall be made with a standard pipe size 
screw joint. Solder shall conform to the require- 
ments of Section 316.1.3. Brazed joints shall conform 
to the requirements of Section 316.1.7. Flared joints 
shall conform to the requirements of Section 316.1.4. 
Pressed joints shall conform to the requirements of 
316.1.9. 

316.2.2 Unions. Approved unions shall be 
permitted to be used in drainage piping when 
accessibly located in the trap seal or between a 
fixture and its trap in the vent system, except 



26 



GENERAL REGULATIONS 



316.2-320.0 



underground or in wet vents, at any point in the 
water supply system, and in gas piping as 
permitted by Section 121 1 .3.2(4). 

316.2-3 Plastic Pipe to Other Materials. When 
connecting plastic pipe to other types of piping, 
only approved types of fittings and adapters 
designed for the specific transition intended 
shall be used. 

316.3 Flanged Fixture Connections. 

316.3.1 Fixture connections between drainage 
pipes and water closets, floor outlet service sinks 
and urinals shall be made by means of approved 
brass, hard lead, ABS, PVC, or iron flanges 
caulked, soldered, solvent cemented; rubber 
compression gaskets; or screwed to the drainage 
pipe. The connection shall be bolted with an 
approved gasket, washer, or setting compound 
between the fixture and the connection. The bottom 
of the flange shall be set on an approved firm base. 

31 6.3.2 Closet bends or stubs shall be cut off so as 
to present a smooth surface even with the top of 
the closet ring before rough inspection is called. 

316.3.3 Wall-mounted water closet fixtures shall 
be securely bolted to an approved carrier fitting. 
The connecting pipe between the carrier fitting 
and the fixture shall be an approved material 
and designed to accommodate an adequately 
sized gasket. Gasket material shall be neoprene, 
felt, or similar approved types. 

316.4 Prohibited Joints and Connections. 

316.4.1 Drainage System. Any fitting or 
connection that has an enlargement, chamber, or 
recess with a ledge, shoulder, or reduction of 
pipe area that offers an obstruction to flow 
through the drain shall be prohibited. 

316.4.2 No fitting or connection that offers 
abnormal obstruction to flow shall be used. The 
enlargement of a three (3) inch (80 mm) closet 
bend or stub to four (4) inches (100 mm) shall 
not be considered an obstruction. 

317.0 Increasers and Reducers. 

Where different sizes of pipes and fittings are to be 
connected, the proper size increasers or reducers or 
reducing fittings shall be used between the two sizes. 
Brass or cast-iron body cleanouts shall not be used as 
a reducer or adapter from cast-iron drainage pipe to 
iron pipe size (IPS) pipe. 

318.0 Food-Handling Establishments. 

Food or drink shall not be stored, prepared, or 
displayed beneath soil or drain pipes, unless those 
areas are protected against leakage or condensation 



from such pipes reaching the food or drink as 
described below. Where building design requires 
that soil or drain pipes be located over such areas, 
the installation shall be made with the least possible 
number of joints and shall be installed so as to 
connect to the nearest adequately sized vertical stack 
with the provisions as follows: 

318.1 Openings through floors over such 
areas shall be sealed water-tight to the floor 
construction. 

318.2 Floor and shower drains installed above 
such areas shall be equipped with integral 
seepage pans. 

318.3 Soil or drain pipes shall be of an 
approved material as listed in Table 14-1 and Section 
701.0. Materials shall conform to established stan- 
dards. Cleanouts shall be extended through the floor 
construction above. 

318.4 Piping subject to operation at temperatures 
that will form condensation on the exterior of the 
pipe shall be thermally insulated. 

318.5 Where pipes are installed in ceilings above 
such areas, the ceiling shall be of the removable 
type, or shall be provided with access panels in order 
to form a ready access for inspection of piping. 

31 9.0 Test Gauges. 

Tests required by this code, which are performed 
utilizing dial gauges, shall be limited to gauges 
having the following pressure graduations or incre- 
mentations. 

319.1 Required pressure tests of ten (10) psi (69 kPa) 
or less shall be performed with gauges of one-tenth 
of a pound (0.10) (0.7 kPa) incrementation or less. 

319.2 Required pressure tests exceeding ten (10) 
pounds (69 kPa) but less than or equal to one- i 
hundred (100) psi (689 kPa) shall be performed with 
gauges of one (1) psi (6.9 kPa) incrementation or less. 

319.3 Required pressure tests exceeding one- 
hundred (100) psi (689 kPa) shall be performed with 
gauges incremented for two (2) percent or less of the 
required test pressure. 

319.4 Test gauges shall have a pressure range not 
exceeding twice the test pressure applied. 

320.0 Medical Gas and Vacuum Systems. 

Such piping shall be installed, tested, and verified in 
compliance with the applicable standards referenced 
in Table 14-1 and the requirements of Chapter 13. The 
Authority Having Jurisdiction shall require evidence 
of the competency of the installers and verifiers. 



27 



Table 3-2 



UNIFORM PLUMBING CODE 



TABLE 3-2 
Hangers and Supports 



Materials 



Types of Joints 



Horizontal 



Vertical 



Cast 



Lead and Oakum 



Compression Gasket 



5 feet (1,524 mm), except 10 feet 
(3,048 mm) where 10 foot 
lengths (3,048 mm) are 
installed 1 ' 2 ' 3 

Every other joint, unless over 4 
feet (1,219 mm), then support 
each joint 1 ' 2,3 



Base and each floor not to 
exceed 15 feet (4,572 mm) 



Base and each floor a maximum 
of 15 feet (4,572 mm) 



r jut 

Every other joint, unless over 4 
feet (1,219 mm), then support 
each joint '"' ' 4 



Cast-Iron Hubless 



Shielded Coupling 



Base and each floor a maximum 
of 15 feet (4,572 mm) 



1-1/2 inches (40 mm) and 
smaller, 6 feet (1,829 mm), 2 
inches (50 mm) and larger, 10 
feet (3,048 mm) 



Copper Tube and Pipe 



Soldered or Brazed 



Each floor, a maximum of 10 
feet (3,048 mm) 5 



Steel and Brass Pipe for Water Threaded or Welded 
or DWV 



3/4 inch (20 mm) and smaller, 
10 feet (3,048 mm), 1 inch (25 
mm) and larger, 12 feet (3,658 
mm) 



Every other floor, a maximum 
of 25 feet (7,620 mm) 5 



Steel, Brass, and Tinned 
Copper Pipe for Gas 



Threaded or Welded 



1/2 inch (15 mm), 6 feet (1,829 
mm), 3/4 inch (20 mm) and 
1 inch (25 mm), 8 feet (2,438 
mm), 1-1/4 inch (32 mm) and 
larger, 10 feet (3,048 mm) 



1/2 inch (15 mm), 6 feet (1,829 
mm), 3/4 inch (20 mm) and 1 
inch (25 mm), 8 feet (2,438 
mm), 1-1/4 (32 mm) every floor 
level 



Schedule 40 PVC and ABS 
DWV 



Solvent Cemented 



All sizes, 4 feet (1,219 mm). 
Allow for expansion every 30 
feet (9,144 mm). 3 ' 6 



Base and each floor. Provide 
mid-story guides. Provide for 
expansion every 30 feet (9,144 

mm). 



CPVC 



Polypropylene (PP) 



Solvent Cemented 



1 inch (25 mm) and smaller, 3 
feet (914 mm), 1-1/4 inch (32 
mm) and larger, 4 feet (1,219 
mm) 



Base and each floor. Provide 
mid-story guides. 6 



Lead 


Wiped or Burned 


Continuous Support 


A maximum of 4 feet (1,219 mm) 


Copper 


Mechanical 


In accordance with standards acceptable to the Authority Having 
Jurisdiction 


Steel and Brass 


Mechanical 


In accordance with standards acceptable to the Authority Having 
Jurisdiction 


PEX 


Metal Insert and Metal 
Compression 


32 inches (813 mm) 


Base and each floor. 
Provide mid-story guides. 


PEX-AL-PEX 


Metal Insert and Metal 
Compression 


1/2 inch (15 mm) 1 All sizes 
3/4 inch (20 mm) >98 inches 
1 inch (25 mm) J (2,489 mm) 


Base and each floor. 
Provide mid-story guides. 


PE-AL-PE 


Metal Insert and Metal 
Compression 


1/2 inch (15 mm)] All sizes 
3/4 inch (20 mm) >98 inches 
1 inch (25 mm) J (2,489 mm) 


Base and each floor. 
Provide mid-story guides. 



Fusion weld (socket, butt, 
saddle, electrofusion), threaded 
(metal threads only), or mechan- 
ical 



1 inch (25 mm) and smaller, 32 
inches (813 mm); 1-1/4 inches 
(32 mm) and larger, 4 feet (1,219 
mm) 



Base and each floor. 
Provide mid-story guides. 



Support adjacent to joint, a maximum of eighteen (18) inches (457 mm). 
Brace at a maximum of forty (40) feet (12,192 mm) intervals to prevent horizontal movement. 
Support at each horizontal branch connection. 
Hangers shall not be placed on the coupling. 

Vertical water lines shall be permitted to be supported in accordance with recognized engineering principles with regard to expansion and contrac- 
tion, when first approved by the Authority Having Jurisdiction. 
See the appropriate IAPMO Installation Standard for expansion and other special requirements. 



28 



CHAPTER 4 

PLUMBING FIXTURES AND FIXTURE FITTINGS 



401.0 Materials - General Requirements. 

401.1 Quality of Fixtures. Plumbing fixtures shall be 
constructed of dense, durable, non-absorbent mate- 
rials and shall have smooth, impervious surfaces, free 
from unnecessary concealed fouling surfaces. Except 
as permitted elsewhere in this code, fixtures shall 
conform in quality and design to nationally recog- 
nized applicable standards included in Table 14-1. 

401.2 Lead. Sheet lead shall be not less than the 
following: 

For safe pans not less than four (4) pounds per 
square foot (19.5 kg/m 2 ) or one-sixteenth (1/16) of 
an inch (1.6 mm) thick. (See Table 14-1) 

401.3 Plumbing fixture fittings covered under the 
scope of NSF 61 shall comply with the requirements 
ofNSF61. 

402.0 Water-Conserving Fixtures and Fittings. 

402.1 Flush volumes for low-consumption and 
water-saver water closets and urinals shall be in 
accordance with applicable standards referenced in 
Table 14-1. 

402.2 Water Closets. Water closets, either flush 
tank, flushometer tank, or flushometer valve oper- 
ated, shall have an average consumption of a 
maximum of 1.6 gallons (6.1 liters) of water per 
flush. 

402.3 Urinals. Urinals shall have an average water 
consumption of a maximum of 1 gallon (3.8 liters) of 
water per flush. 

402.3.1 Nonwater Urinals. Nonwater urinals 
shall be listed and comply with the applicable 
standards referenced in Table 14-1. Nonwater 
urinals shall have a barrier liquid sealant to main- 
tain a trap seal. Nonwater urinals shall permit the 
uninhibited flow of waste through the urinal to 
the sanitary drainage system. Nonwater urinals 
shall be cleaned and maintained in accordance 
with the manufacturer's instructions after instal- 
lation. Where nonwater urinals are installed they 
shall have a water distribution line rough-in to 
the urinal location to allow for the installation of 
an approved backflow prevention device in the 
event of a retrofit. 

402.4 Metered Faucets. Self-closing or self-closing 
metering faucets shall be installed on lavatories 
intended to serve the transient public, such as those 
in, but not limited to, service stations, train stations, 
airports, restaurants, and convention halls. Metered 



faucets shall deliver a maximum of 0.26 gallons (1.0 
liter) of water per use. 

402.5 Emergency Safety Showers. Emergency 
safety showers shall not be limited in their water 
supply flow rates. 

402.6 Installation. Water-conserving fixtures shall 
be installed in strict accordance with the manufac- 
turer's instructions to maintain their rated perfor- 
mance. 

403.0 Overflows. 

When any fixture is provided with an overflow, the 
waste shall be so arranged that the standing water in 
the fixture cannot rise in the overflow when the 
stopper is closed or remain in the overflow when the 
fixture is empty. The overflow pipe from a fixture 
shall be connected on the house or inlet side of the 
fixture trap, except that overflow on flush tanks shall 
be permitted to discharge into the water closets or 
urinals served by them, but it shall be unlawful to 
connect such overflows with any other part of the 
drainage system. 

404.0 Strainers and Connections. 

404.1 Strainers. Plumbing fixtures, other than water 
closets and urinals, shall be equipped with approved 
strainers having an approved waterway area. 
Strainers serving shower drains shall have a 
waterway equivalent to the area of the tailpiece. 

404.2 Connections. Fixtures having concealed slip 
joint connections shall be provided with an access 
panel or utility space not less than twelve (12) inches 
(305 mm) in its least dimension and so arranged 
without obstructions as to make such connections 
accessible for inspection and repair. 

404.3 Continuous wastes and fixture tailpieces shall be 
constructed from the materials specified in Section 
701.0 for drainage piping, provided, however, that 
such connections where exposed or accessible shall be 
permitted to be of seamless drawn brass not less than 
No. 20 B & S Gauge (0.032 inches) (0.8 mm). Each such 
tailpiece, continuous waste, or waste and overflow 
shall be not less than one and one-half (1-1/2) inches 
(40 mm) O.D. for sinks, dishwashers, laundry tubs, 
bathtubs, urinals, and similar fixtures, and not less 
than one and one-quarter (1-1/4) inches (32 mm) for 
lavatories, drinking fountains, and similar small 
fixtures. 



29 



404.4 - 408.2 



UNIFORM PLUMBING CODE 



TIA 1 



404.4 Approved wye or other directional-type 
branch fittings shall be installed in continuous 
wastes connecting or receiving the discharge from 
food waste disposal units, dishwashers, clothes 
washers, or other force discharge fixtures or appli- 
ances. No dishwasher drain shall be connected to a 
sink tailpiece, continuous waste, or trap on the 
discharge side of a food waste disposal unit. 

405.0 Prohibited Fixtures. 

405.1 Water closets having an invisible seal or an 
unventilated space or having walls which are not 
thoroughly washed at each discharge shall be 
prohibited. Any water closet that might permit 
siphonage of the contents of the bowl back into the 
tank shall be prohibited. Drinking fountains shall not 
be installed in public toilet rooms. 

405.2 Prohibited Urinals. Trough urinals and urinals 
with an invisible seal shall be prohibited. 

TlA B Exception: Non-water urinals. 

405.3 Fixed wooden, or tile wash trays or sinks for 
domestic use shall not be installed in any building 
designed or used for human habitation. No sheet 
metal-lined wooden bathtub shall be installed or 
reconnected. No dry or chemical closet (toilet) shall 
be installed in any building used for human habita- 
tion, unless first approved by the Health Officer. 

406.0 Special Fixtures and Specialties. 

406.1 Water and Waste Connections. Baptisteries, 
ornamental and lily ponds, aquaria, ornamental 
fountain basins, and similar fixtures and specialties 
requiring water and /or waste connections shall be 
submitted for approval to the Authority Having 
Jurisdiction prior to installation. 

406.2 Restaurant kitchen and other special use sinks 
shall be permitted to be made of approved-type 
bonderized and galvanized sheet steel of not less 
than No. 16 U.S. gauge (0.0625 inches) (1.6 mm). Sheet- 
metal plumbing fixtures shall be adequately designed, 
constructed, and braced in an approved manner to 
satisfactorily accomplish their intended purpose. 

406.3 Special Use Fixtures. Special use fixtures 
shall be made of one of the following: 

(1) Soapstone 

(2) Chemical stoneware 

(3) Copper-based alloy 

(4) Nickel-based alloy 

(5) Corrosion-resistant steel 

(6) Other materials suited for the intended use of 
the fixture. 

406.4 Zinc Alloy Components. Zinc alloy compo- 
nents shall meet the applicable nationally recognized 
standards and shall be used in accordance with their 
listing. 



407.0 Installation. 

407.1 Cleaning. Plumbing fixtures shall be installed 
in a manner to afford easy access for repairs and 
cleaning. Where practical, pipes from fixtures shall 
be run to the nearest wall. 

407.2 Joints. Where a fixture comes in contact with 
the wall or floor, the joint between the fixture and 
the wall or floor shall be made water-tight. 

407.3 Securing Fixtures. Floor-outlet or floor- 
mounted fixtures shall be rigidly secured to the 
drainage connection and to the floor, when so 
designed, by screws or bolts of copper, brass, or 
other equally corrosion-resistant material. 

407.4 Wall-Hung Fixtures. Wall-hung fixtures shall 
be rigidly supported by metal supporting members 
so that no strain is transmitted to the connections. 
Flush tanks and similar appurtenances shall be 
secured by approved non-corrosive screws or bolts. 

407.5 Setting. Fixtures shall be set level and in 
proper alignment with reference to adjacent walls. 
No water closet or bidet shall be set closer than 
fifteen (15) inches (381 mm) from its center to any 
side wall or obstruction nor closer than thirty (30) 
inches (762 mm) center to center to any similar 
fixture. The clear space in front of any water closet 
or bidet shall be not less than twenty-four (24) 
inches (610 mm). No urinal shall be set closer than 
twelve (12) inches (305 mm) from its center to any 
side wall or partition nor closer than twenty-four 
(24) inches (610 mm) center to center. 

Exception: The installation of paper dispensers 
or accessibility grab bars shall not be consid- 
ered obstructions. 

407.6 Installations for Persons with Disabilities. 

Where facilities for persons with disabilities are 
required in applicable building regulations, the facil- 
ities shall be installed in accordance with those regu- 
lations. 

407.7 Supply Fittings. The supply lines and fittings 
for every plumbing fixture shall be so installed as to 
prevent backflow as required in Chapter 6. 

408.0 Water Closets. 

408.1 Water closet bowls for public use shall be of 
the elongated type. In nurseries, schools, and other 
similar places where plumbing fixtures are provided 
for the use of children less than six (6) years of age, 
water closets shall be of a size and height suitable for 
children's use. Water closets shall be equipped with 
seats as required below. 

408.2 Water Closet Seats. 

408.2.1 Water closet seats shall be of smooth, 
non-absorbent material. Seats for public use j 



30 



PLUMBING FIXTURES AND FIXTURE FITTINGS 



408.2-410.5 



I 



I 



shall conform to the applicable standard refer- 
enced in Table 14-1. 

408.2.2 Water closet seats, for public use, shall 
be of the elongated type and either of the open 
front type or have an automatic seat cover 
dispenser. 

408.2.3 Water closet seats shall be properly sized 
for the water closet bowl type. 

408.3 Securing Floor-Mounted, Back-Outlet Water 
Closet Bowls. Floor-mounted, back-outlet water 
closet bowls shall be set level with an angle of ninety 
(90) degrees (1.57 rad) between the floor and wall at 
the centerline of the fixture outlet. The floor and wall 
shall have a flat mounting surface not less than five 
(5) inches (127 mm) to the right and left of the fixture 
outlet centerline. The fixture shall be secured to the 
wall outlet flange or drainage connection and to the 
floor by corrosion-resistant screws or bolts. The 
closet flange shall be secured to a firm base. 

Where floor-mounted, back-outlet water closets 
are used, the soil pipe shall be not less than three (3) 
inches (80 mm) in diameter. Offset, eccentric, or 
reducing floor flanges shall not be used. 

408.4 Closet Rings (Closet Flanges). 

408.4.1 Closet rings (closet flanges) for water 
closets or similar fixtures shall be of an 
approved type and shall be bronze, copper, hard 
lead, cast-iron, galvanized malleable iron, ABS, 
PVC, or other approved materials. Each such 
closet ring (closet flange) shall be approximately 
seven (7) inches (178 mm) in diameter and, 
when installed, shall, together with the soil pipe, 
present a one and one-half (1-1/2) inch (38 mm) 
wide flange or face to receive the fixture gasket 
or closet seal. 

408.4.2 Caulked-on closet rings (closet flanges) 
shall be not less than one-fourth (1/4) inch (6.4 
mm) thick and not less than two (2) inches (51 
mm) in overall depth. 

408.4.3 Closet rings (closet flanges) shall be 
burned or soldered to lead bends or stubs, shall 
be caulked to cast-iron soil pipe, shall be solvent 
cemented to ABS and PVC, and shall be screwed 
or fastened in an approved manner to other 
materials. 

408.4.4 Closet rings (closet flanges) shall be 
adequately designed and secured to support 
fixtures connected thereto. 

408.4.5 Closet screws, bolts, washers, and 
similar fasteners shall be of brass, copper, or 
other listed, equally corrosion-resistant mate- 
rials. Screws and bolts shall be of adequate size 
and number to properly support the fixture 
installed. 



409.0 Urinals. 

Every water supply to a urinal shall be protected by 
an approved-type vacuum breaker or other 
approved backflow prevention device as described 
in Section 603.4. 

410.0 Flushing Devices for Water Closets and 
Urinals. 

410.1 Flushing Devices Required. Each water 
closet, urinal, clinic sink, or other plumbing fixture 
that depends on trap siphonage to discharge its 
waste contents shall be provided with a flushometer 
valve, flushometer tank, or flush tank designed and 
installed so as to supply water in sufficient quantity 
and rate of flow to flush the contents of the fixture to 
which it is connected, to cleanse the fixture, and to 
refill the fixture trap, without excessive water use. 
Flushing devices shall meet anti-siphon require- 
ments required in Chapter 6. 

410.2 Automatic Flushing Tanks. Tanks flushing 
more than one (1) urinal shall be automatic in opera- 
tion and of sufficient capacity to provide the neces- 
sary volume to flush and properly cleanse urinals 
simultaneously. Automatically controlled 
flushometer valves shall be permitted to be substi- 
tuted for flush tanks. 

410.3 Flushometer Valves. No manually controlled 
flushometer valve shall be used to flush more than 
one (1) urinal, and each such urinal flushometer 
valve shall be an approved, self-closing type 
discharging a predetermined quantity of water. 
Flushometers shall be installed so that they will be 
accessible for repair. Flushometer valves shall not be 
used where the water pressure is insufficient to 
properly operate them. When the valve is operated, 
it shall complete the cycle of operation automatically, 
opening fully and closing positively under the line 
water pressure. Each flushometer shall be provided 
with a means for regulating the flow through it. 

410.4 Water Supply for Flush Tanks. An adequate 
quantity of water shall be provided to flush and 
clean the fixture served. The water supply for 
flushing tanks and flushometer tanks equipped for 
manual flushing shall be controlled by a float valve 
or other automatic device designed to refill the tank 
after each discharge and to completely shut off the 
water flow to the tank when the tank is filled to oper- 
ational capacity. Provision shall be made to automat- 
ically supply water to the fixture so as to refill the 
trap seal after each flushing. The water supply to 
flush tanks equipped for automatic flushing shall be 
controlled by a suitable timing device. 

410.5 Overflows in Flush Tanks. Flush tanks shall 
be provided with overflows discharging into the 



31 



410.5-411.8 



UNIFORM PLUMBING CODE 



water closet or urinal connected thereto. Overflows 
supplied as original parts with the fixture shall be of 
sufficient size to prevent tank flooding at the 
maximum rate at which the tank is supplied with 
water under normal operating conditions and when 
installed per manufacturer's instructions. 

411.0 Floor Drains and Shower Stalls. 

411.1 Floor drains shall be considered plumbing 
fixtures, and each such drain shall be provided with 
an approved-type strainer having a waterway equiv- 
alent to the area of the tailpiece. Floor drains, floor 
receptors, and shower drains shall be of an approved 
type, suitably flanged to provide a water-tight joint 
in the floor. 

411.2 Location of Floor Drains. Floor drains shall 
be installed in the following areas: 

411.2.1 Toilet rooms containing two (2) or 
more water closets or a combination of one (1) 
water closet and one (1) urinal, except in a 
dwelling unit. 

41 1 .2.2 Commercial kitchens and in accordance 
I with Section 704.3. 

41 1 .2.3 Laundry rooms in commercial buildings 
and common laundry facilities in multi-family 
dwelling buildings. 

411.3 Food Storage Areas. If drains are provided 
in storerooms, walk-in freezers, walk-in coolers, 
refrigerated equipment, or other locations where 
food is stored, such drains shall have indirect waste 
piping. Separate waste pipes shall be run from each 
food storage area, each with an indirect connection 
to the building sanitary drainage system. Traps shall 
be provided if required under Section 801.2.2 of this 
code and shall be vented. 

Indirect drains shall be permitted to be located 
in freezers or other spaces where freezing tempera- 
tures are maintained, provided that traps, when 
supplied, are located where the seal will not freeze. 
Otherwise, the floor of the freezer shall be sloped to 
a floor drain located outside of the storage compart- 
ment. 

411.4 Floor Slope. Floors shall be sloped to floor 
drains. 

41 1 .5 Shower receptors are plumbing fixtures and 
shall conform to the general requirements contained 
in Section 401.0. Each such shower receptor shall be 
constructed of vitrified china or earthenware, 
ceramic tile, porcelain-enameled metal, or of such 
other material acceptable to the Authority Having 
Jurisdiction. No shower receptor shall be installed 
unless it conforms to acceptable standards as refer- 
enced in Table 14-1 or until a specification or a proto- 



type or both of such receptor has first been 
submitted to and approval obtained from the 
Authority Having Jurisdiction. 

411.6 Each shower receptor shall be an approved 
type and be so constructed as to have a finished dam, 
curb, or threshold that is not less than one (1) inch 
(25.4 mm) lower than the sides and back of such 
receptor. In no case shall any dam or threshold be 
less than two (2) inches (51 mm) or exceeding nine (9) 
inches (229 mm) in depth when measured from the 
top of the dam or threshold to the top of the drain. 
Each such receptor shall be provided with an integral 
nailing flange to be located where the receptor meets 
the vertical surface of the finished interior of the 
shower compartment. The flange shall be water-tight 
and extend vertically not less than one (1) inch (25.4 
mm) above the top of the sides of the receptor. The 
finished floor of the receptor shall slope uniformly 
from the sides toward the drain not less than one- 
quarter (1/4) inch per foot (20.8 mm/m), nor more 
than one-half (1/2) inch per foot (41.8 mm/m). 
Thresholds shall be of sufficient width to accommo- 
date a minimum twenty-two (22) inch (559 mm) door. 
Shower doors shall open so as to maintain not less 
than a twenty-two (22) inch (559 mm) unobstructed 
opening for egress. 

Exception: Showers that are designed to 
comply with the accessibility standards listed in 
Table 14-1. 

41 1 .7 Shower compartments, regardless of shape, 
shall have a minimum finished interior of one thou- 
sand and twenty-four (1,024) square inches (0.66 m 2 ) 
and shall also be capable of encompassing a thirty (30) 
inch (762 mm) circle. The minimum required area and 
dimensions shall be measured at a height equal to the 
top of the threshold and at a point tangent to its 
centerline. The area and dimensions shall be main- 
tained to a point of not less than seventy (70) inches 
(1,778 mm) above the shower drain outlet with no 
protrusions other than the fixture valve or valves, 
shower head, soap dishes, shelves, and safety grab 
bars or rails. Fold-down seats in accessible shower 
stalls shall be permitted to protrude into the thirty (30) 
inch (762 mm) circle. 

Exception No. 1: Showers that are designed to 
comply with ICC All 7.1. 

Exception No. 2: The minimum required area and 
dimension shall not apply for a shower receptor 
having overall dimensions of not less than thirty 
(30) inches (762 mm) in width and sixty (60) 
inches (1,524 mm) in length. 

411.8 When the construction of on-site built-up 
shower receptors are permitted by the Authority 
Having Jurisdiction, receptors built directly on the 
ground shall be water-tight and shall be constructed 



32 



PLUMBING FIXTURES AND FIXTURE FITTINGS 



411.8-411.11 



from approved-type dense, nonabsorbent and noncor- 
rosive materials. Each such receptor shall be 
adequately reinforced, shall be provided with an 
approved flanged floor drain designed to make a 
water-tight joint in the floor, and shall have smooth, 
impervious, and durable surfaces, 

| Shower receptors shall have the subfloor and 

rough side of walls to a height of not less than three 
(3) inches (76 mm) above the top of the finished dam 
or threshold shall be first lined with sheet plastic,* 
lead/ or copper,* or shall be lined with other durable 
and water-tight materials. Showers that are provided 

| with a built in place, permanent seat or seating area 
that is located within the shower enclosure, shall be 
first lined with sheet plastic/ lead,* copper,* or shall 
be lined with other durable and water-tight materials 
that extend not less than three (3) inches (76 mm) 
above horizontal surfaces of the seat or the seating 
area. 

Lining materials shall be pitched one-quarter 
(1 /4) inch per foot (20.8 mm/m) to weep holes in the 
subdrain of a smooth and solidly formed subbase. 
Such lining materials shall extend upward on the 
rough jambs of the shower opening to a point not 

I less than three (3) inches (76 mm) above the hori- 
zontal surfaces of the seat or the seating area, the top 
of the finished dam or threshold and shall extend 
outward over the top of the permanent seat, perma- 
nent seating area, or rough threshold and be turned 
I over and fastened on the outside face of both the 
permanent seat, permanent seating area, or rough 
threshold and the jambs. 

Nonmetallic shower subpans or linings shall be 
permitted to be built up on the job site of not less 
than three (3) layers of standard, grade fifteen (15) 
pound (6.8 kg) asphalt-impregnated roofing felt. The 
bottom layer shall be fitted to the formed subbase 
and each succeeding layer thoroughly hot-mopped 
to that below. Corners shall be carefully fitted and 
shall be made strong and water-tight by folding or 
lapping, and each corner shall be reinforced with 
suitable webbing hot-mopped in place. 

Folds, laps, and reinforcing webbing shall 
extend not less than four (4) inches (102 mm) in all 
directions from the corner, and webbing shall be of 
approved type and mesh, producing a tensile 
strength of not less than fifty (50) psi (344.7 kPa) in 
either direction. Nonmetallic shower subpans or 
linings shall be permitted to consist of multilayers of 
other approved equivalent materials suitably rein- 
forced and carefully fitted in place on the job site as 
elsewhere required in this section. 

Linings shall be properly recessed and fastened 
to approved backing so as not to occupy the space 
required for the wall covering and shall not be nailed 



or perforated at any point that is less than one (1) 
inch (25.4 mm) above the finished dam or threshold. 
An approved-type subdrain shall be installed with 
every shower subpan or lining. Each such subdrain 
shall be of the type that sets flush with the subbase 
and shall be equipped with a clamping ring or other 
device to make a tight connection between the lining 
and the drain. The subdrain shall have weep holes 
into the waste line. The weep holes located in the 
subdrain clamping ring shall be protected from clog- 
ging- 

Shower lining materials shall conform to 
approved standards acceptable to the Authority 
Having Jurisdiction. 

*Note: Lead and copper subpans or linings shall be 
insulated from conducting substances other than 
their connecting drain by fifteen (15) pound (6.8 kg) 
asphalt felt or its equivalent, and no lead pan or liner 
shall be constructed of material weighing less than 
four (4) pounds per square foot (19.5 kg/m 2 ). Copper 
pans or liners shall be not less than No. 24 B & S 
Gauge (0.02 inches) (0.5 mm). Joints in lead pans or 
liners shall be burned. Joints in copper pans or liners 
shall be soldered or brazed. Plastic pans shall not be 
coated with asphalt-based materials. 

411.8.1 Tests for Shower Receptors. Shower 
receptors shall be tested for water-tightness by 
filling with water to the level of the rough 
threshold. The test plug shall be so placed that 
both upper and under sides of the subpan shall 
be subjected to the test at the point where it is 
clamped to the drain. 

411.9 Floors of public shower rooms shall have a 
nonskid surface and shall be drained in such a 
manner that wastewater from one bather shall not 
pass over areas occupied by other bathers. Gutters 
in public or gang shower rooms shall have rounded 
corners for easy cleaning and shall be sloped not 
less than two (2) percent toward drains. Drains in 
gutters shall be spaced at a maximum of eight (8) 
feet (2,438 mm) from sidewalls nor more than 
sixteen (16) feet (4,877 mm) apart. 

411.10 Location of Valves and Heads. Control 
valves and showerheads shall be located on the side- 
wall of shower compartments or otherwise arranged 
so that the showerhead does not discharge directly at 
the entrance to the compartment and the bather can 
adjust the valves prior to stepping into the shower 
spray. 

411.11 Water Supply Riser. Every water supply 
riser from the shower valve to the showerhead 
outlet, whether exposed or not, shall be securely 
attached to the structure. 



33 



412.0-415.0 



UNIFORM PLUMBING CODE 



412.0 Minimum Number of Required Fixtures. 

412.1 Fixture Count. Plumbing fixtures shall be 
provided for the type of building occupancy and in 
the minimum number shown in Table 4-1. 

412.2 Access to Fixtures. 

412.2.1 In multi-story buildings, accessibility to 
the required fixtures shall not exceed one (1) 
vertical story. 

412.2.2 Fixtures accessible only to private offices 
shall not be counted to determine compliance 
with this section. 

412.3 Separate Facilities. 

Separate toilet facilities shall be provided for each sex. 
Exceptions: 

(1) Residential installations. 

(2) In occupancies serving ten (10) or fewer 
people, one (1) toilet facility, designed for 
use by no more than one (1) person at a 
time, shall be permitted for use by both 
sexes. 

(3) In business and mercantile occupancies with 
a total floor area of fifteen-hundred (1,500) 
square feet (139.4 m 2 ) or less, one (1) toilet 
facility, designed for use by no more than 
one (1) person at a time, shall satisfy the 
requirements for serving customers and 
employees of both sexes. 

412.4 Fixture Requirements for Special Occupancies. 

412.4.1 Additional fixtures may be required 
when unusual environmental conditions or 
referenced activities are encountered. 

412.4.2 In food preparation areas, fixture 
requirements may be dictated by health codes. 

412.4.3 Types of occupancy not shown in Table 4- 
1 shall be considered individually by the 
Authority Having Jurisdiction. 

412.5 Facilities in Mercantile and Business Occu- 
pancies Serving Customers. 

412.5.1 Requirements for customers and 
employees shall be permitted to be met with a 
single set of restrooms accessible to both groups. 

The required number of fixtures shall be the 
greater of the required number for employees or 
the required number for customers. 

412.5.2 Fixtures for customer use shall be 
permitted to be met by providing a centrally 
located facility accessible to several stores. The 
maximum distance from entry to any store to 
this facility shall not exceed five-hundred (500) 
feet (152.4 m). 



412.5.3 In stores with a floor area of one- 
hundred and fifty (150) square feet (13.9 m 2 ) or 
less, the requirement to provide facilities for 
employees shall be permitted to be met by 
providing a centrally located facility accessible 
to several stores. The maximum distance from 
entry to any store to this facility shall not exceed 
three-hundred (300) feet (91.4 m). 

412.6 Toilet Facilities for Workers. 

Suitable toilet facilities shall be provided and main- 
tained in a sanitary condition for the use of workers 
during construction. 

413.0 Fixtures and Fixture Fittings for Persons 
with Disabilities. 

Plumbing fixtures and fixture fittings for persons with 
disabilities shall conform to the appropriate standards 
referenced in Table 14-1 of this code. 

413.1 Limitation of Hot Water Temperature for 
Public Lavatories. Hot water delivered from public- 
use lavatories shall be limited to a maximum tempera- 
ture of 120T (49°C) by a device that conforms to ASSE 
1070 or CSA B125.3. The water heater thermostat shall I 
not be considered a control for meeting this provision. 

414.0 Bathtubs and Whirlpool Bathtubs. 

Unless otherwise listed, bathtubs and whirlpool bath- 
tubs shall comply with the following requirements: 

414.1 A removable panel shall be provided to access 
and remove the pump. Whirlpool pump access 
located in the crawl space shall be located no more 
than twenty (20) feet (6,096 mm) from an access door, 
trap door, or crawl hole. 

414.2 The circulation pump shall be located above the 
crown weir of the trap. 

414.3 The pump and the circulation piping shall be 
self-draining to minimize water retention in accor- 
dance with standards referenced in Table 14-1 . 

414.4 Suction fittings on whirlpool bathtubs shall 
comply with the listed standards. 

414.5 Limitation of Hot Water in Bathtubs and 
Whirlpool Bathtubs. The maximum hot water 
temperature discharging from the bathtub and 
whirlpool bathtub filler shall be limited to 120°F 
(49°C) by a device that conforms to ASSE 1070 or CSA I 
B125.3. The water heater thermostat shall not be | 
considered a control for meeting this provision. 

415.0 Installation of Fixture Fittings. 

Where two (2) separate handles control the hot and 
cold water, the left-hand control of the faucet when 



34 



PLUMBING FIXTURES AND FIXTURE FITTINGS 415.0 - 418.0 

facing the fixture fitting outlet shall provide the means 
to alter the hot water temperature from the fixture 
fitting. 

Single-handle mixing valves shall have the flow 
of hot water correspond to the markings on the fitting. 

416.0 Bidets. 

416.1 Materials. Bidets shall conform to the stan- 
dards listed in Table 14-1. 

416.2 Backflow Protection. The water supply to the 
bidet shall be protected according to Chapter 6, 
which allows for an airgap or vacuum breaker. 

416.3 Limitation of Water Temperature in Bidets. 

The maximum hot water temperature discharging 
from a bidet shall be limited to 110°F (43°C) by a 
device that conforms to ASSE 1070 or CSA B125.3. 
The water heater thermostat shall not be considered 
a control for meeting this provision. 

417.0 Future Fixtures. 

When provisions are made- for the future installation 
of fixtures, those provided for shall be considered in 
determining the required sizes of drain pipes. 
Construction for future installations shall be termi- 
nated with a plugged fitting or fittings. Where the 
plugged fitting is at the point where the trap of a 
fixture is installed, the plumbing system for such 
fixture shall be complete and conform with the 
plumbing requirements of this code. 

418.0 Shower and Tub-Shower Combination 
Control Valves. 

Showers and tub-shower combinations in buildings 
shall be provided with individual control valves of 
the pressure balance, thermostatic, or combination 
pressure balance /thermostatic mixing valve type 
that provide scald and thermal shock protection. 
These valves shall conform to ASSE 1016 or ASME 
| A112.18.1/CSA B125.1. Gang showers, when 
supplied with a single temperature-controlled water 

I supply pipe, shall be controlled by a mixing valve 
that conforms to ASSE 1069. Handle position stops 
shall be provided on such valves and shall be 
adjusted per the manufacturer's instructions to 
deliver a maximum mixed water setting of 120°F 
(49°C). The water heater thermostat shall not be 
considered a suitable control for meeting this provi- 
sion. 



35 



Table 4-1 



UNIFORM PLUMBING CODE 



TABLE 4-1 
Minimum Plumbing Facilities 1 

Each building shall be provided with sanitary facilities, including provisions for persons with disabilities as prescribed by the 
Department Having Jurisdiction. Table 4-1 applies to new buildings, additions to a building, and changes of occupancy or type in 
an existing building resulting in increased occupant load. Exception: New cafeterias used only by employees. 

The total occupant load shall be determined in accordance with the Building Code. The type of building or occupancy shall be 
determined based on the actual use of the various spaces within the building. Building categories not shown in Table 4-1 shall be 
considered separately by the Authority Having Jurisdiction. The minimum number of fixtures shall be calculated at 50 percent male 
and 50 percent female based on the total occupant load. 

Once the occupant load and uses are determined, the requirements of Section 412.0 and Table 4-1 shall be applied to determine 
the minimum number of plumbing fixtures required. 



Type of Building 2 


Water Closets 14 


Urinals 5 ' 10 


Lavatories 


Bathtubs or 


Drinking 3,13 ' 17 


or Occupancy 


(Fixtures per Person) 


(Fixtures per Person) 


(Fixtures per Person) 


Showers 
(Fixtures per 
Person) 


Fountains 
(Fixtures per 
Person) 


Assembly places - 


Male Female 


Male 


Male Female 






theatres, audito- 


1:1-15 1:1-15 


0:1-9 


1 per 40 1 per 40 






riums, convention 


2:16-35 3:16-35 


1:10-50 








hails, etc.- for 


3: 36-55 4: 36-55 


Add one fixture for 








permanent 


Over 55, add 1 fixture for each 


each additional 50 








employee use 


additional 40 persons. 


males. 








Assembly places - 


Male Female 


Male 


Male Female 




1: 1-150 


theatres, audito- 


1: 1-100 3: 1-50 


1: 1-100 


1:1-200 1:1-200 




2: 151-400 


riums, convention 


2:101-200 4:51-100 


2: 101-200 


2: 201-400 2: 201-400 




3: 401-750 


halls, etc.- for 


3: 201-400 8: 101-200 


3: 201-400 


3:401-750 3:401-750 




Over' 750, add 


public use 


11: 201-400 


4: 401-600 


Over 750, add one 




one fixture for 




Over 400, add one fixture for 


Over 600, add 1 fixture 


fixture for each addi- 




each additional 




each additional 500 males 


for each additional 300 


tional 500 persons. 




500 persons. 




and 1 for each additional 125 


males. 










females. 










Dormitories 9 - 


Male Female 


Male 


Male Female 


lper8 


1 per 150 12 


^rbool or Ipihnr 


1 per 10 1 per 8 


1 per 25 


1 per 12 1 per 12 


For females, add 




iJV-l IUU1 Ul ICIU\JL 


Add 1 fixture for each addi- 


Over 150, add 1 fixture 


Over 12, add one fixture 


1 bathtub per 30. 






tional 25 males (over 10) and 


for each additional 50 


for each additional 20 


Over 150, add 1 






1 for each additional 20 


males. 


males and 1 for each 15 


bathtub per 20. 






females (over 8). 




additional females. 






Dormitories - for 


Male Female 


Male 


Male Female 






staff use 16 


1: 1-15 1: 1-15 
2: 16-35 3: 16-35 
3: 36-55 4: 36-55 
Over 55, add 1 fixture for 
each additional 40 persons. 


1 per 50 


1 per 40 1 per 40 


1 per 8 




Dwellings 4 












Single dwelling 


1 per dwelling 




1 per dwelling 


1 per dwelling 




Multiple dwelling 


1 per dwelling or apartment 




1 per dwelling or apart- 


1 per dwelling or 




or apartment 


unit 




ment unit 


apartment unit 




house 16 












Hospital waiting 


1 per room 




1 per room 




lper!50 12 


rooms 












Hospitals - for 


Male Female 


Male 


Male Female 






employee use 


1: 1-15 1: 1-15 
2: 16-35 3: 16-35 
3: 36-55 4: 36-55 
Over 55, add 1 fixture for 
each additional 40 persons. 


0:1-9 

1: 10-50 

Add one fixture for 

each additional 50 

males. 


1 per 40 1 per 40 







36 



PLUMBING FIXTURES AND FIXTURE FITTINGS 



Table 4-1 continued 



Type of Building 2 


Water Closets 14 


Urinals 510 


Lavatories 


Bathtubs or 


Drinking 31317 


or Occupancy 


(Fixtures per Person) 


(Fixtures per Person) 


(Fixtures per Person) 


Showers 
(Fixtures per 
Person) 


Fountains 
(Fixtures per 
Person) 


Hospitals 












Individual room 


1 per room 




1 per room 


1 per room 


1 per 150 12 


Ward room 


1 per 8 patients 




1 per 10 patients 


1 per 20 patients 




Industrial 1 ware- 


Male Female 




Up to 100, 1 per 10 


1 shower for 


1 per 150 12 


houses, work- 


1: 1-10 1: 1-10 




persons 


each 15 persons 




shops, foundries, 


2:11-25 2:11-25 




Over 100, 1 per 15 


exposed to 




and similar estab- 


3: 26-50 3: 26-50 




persons 7,8 


excessive heat or 




lishments - for 


4: 51-75 4: 51-75 






to skin contami- 




employee use 


5: 76-100 5: 76-100 
Over 100, add 1 fixture for 
each additional 30 persons. 






nation with 
poisonous, 
infectious or irri- 
tating material 




Institutional - 


Male Female 


Male 


Male Female 


1 per 8 


lperl50 12 


other than hospi- 


1 per 25 1 per 20 


0:1-9 


1 per 10 1 per 10 




tals or penal insti- 




1: 10-50 








tutions (on each 




Add one fixture for 








occupied floor) 




each additional 50 
males. 








Institutional - 


Male Female 


Male 


Male Female 


1 per 8 


1 per 150 12 


other than hospi- 


1:1-15 1:1-15 


0: 1-9 


1 per 40 1 per 40 






tals or penal insti- 


2: 16-35 3: 16-35 


1: 10-50 








tutions (on each 


3: 36-55 4: 36-55 


Add one fixture for 








occupied floor) - 


Over 55, add 1 fixture for 


each additional 50 








for employee use 


each additional 40 persons. 


males. 








Office or public 


Male Female 


Male 


Male Female 




1 per 150 12 


buildings 


1: 1-100 3: 1-50 


1: 1-100 


1:1-200 1:1-200 






2: 101-200 4: 51-100 


2: 101-200 


2:201-400 2:201-400 








3: 201-400 8: 101-200 


3: 201-400 


3:401-750 3:401-750 








11:201-400 


4: 401-600 


Over 750, add one 








Over 400, add one fixture 


Over 600, add 1 


fixture for each addi- 








for each additional 500 


fixture for each addi- 


tional 500 persons. 








males and 1 for each addi- 


tional 300 males. 










tional 150 females. 










Office or public 


Male Female 


Male 


Female Male 






buildings - for 


1:1-15 1:1-15 


0:1-9 


1 per 40 1 per 40 






employee use 


2: 16-35 3: 16-35 
3: 36-55 4: 36-55 
Over 55, add 1 fixture for 
each additional 40 persons. 


1: 10-50 

Add one fixture for 

each additional 50 

males. 








Penal institutions 


Male Female 


Male 


Male Female 




1 per 150 12 


- for employee 


1:1-15 1:1-15 


0:1-9 


1 per 40 1 per 40 




use 


2:16-35 3:16-35 
3: 36-55 4: 36-55 
Over 55 r add 1 fixture for 
each additional 40 persons. 


1: 10-50 

Add one fixture for 

each additional 50 

males. 








Penal institutions 












- for prison use 












Cell 


1 per cell 


Male 


1 per cell 




1 per cell block 


Exercise room 


1 per exercise room 


1 per exercise room 


1 per exercise room 




floor 

1 per exercise 

room 



37 



Table 4-1 continued 



UNIFORM PLUMBING CODE 



Type of Building 2 
or Occupancy 


Water Closets 14 
(Fixtures per Person) 


Urinals 510 
(Fixtures per Person) 


Lavatories 
(Fixtures per Person) 


Bathtubs or 
Showers 
(Fixtures per 
Person) 


Drinking 31317 
Fountains 
(Fixtures per 
Person) 


Public or profes- 
sional offices 13 


Same as Office or Public 
Buildings for employee 
use 15 


Same as Office or 
Public Buildings for 
employee use 15 


Same as Office or 
Public Buildings for 
employee use 15 




Same as Office 
or Public Build- 
ings for 
employee use 15 


Restaurants, 
pubs, and 
lounges 11,15 


Male Female 
1: 1-50 1: 1-50 
2:51-150 2:51-150 
3: 151-300 4: 151-300 
Over 300, add 1 fixture 
for each additional 200 
persons. 


Male 
1: 1-150 

Over 150, add 1 
fixture for each addi- 
tional 150 males. 


Male Female 
1: 1-150 1: 1-150 
2:151-200 2:151-200 
3:201-400 3:201-400 
Over 400, add 1 
fixture for each addi- 
tional 400 persons. 






Retail or Whole- 
sale Stores 


Male Female 
1:1-100 1:1-25 
2:101-200 2:26-100 
3:201-400 4:101-200 
6:201-300 
8: 301-400 
Over 400, add one fixture 
for each additional 500 
males and one for each 
150 females 


Male 
0:0-25 
1:26-100 
2:101-200 
3:201-400 
4:401-600 
Over 600, add one 
fixture for each addi- 
tional 300 males 


1 per 2 water closets 




0: 1-30 17 
1:31-150 
One additional 
drinking foun- 
tain for each 
150 persons 
thereafter 


Schools - for staff 

use 

All schools 


Male Female 
1:1-15 1:1-15 
2: 16-35 2: 16-35 
3: 36-55 3: 36-55 
Over 55, add 1 fixture for 
each additional 40 
persons. 


Male 
1 per 50 


Male Female 
1 per 40 1 per 40 






Schools - for 
student use 
Nursery 


Male Female 
1: 1-20 1: 1-20 
2: 21-50 2: 21-50 
Over 50, add 1 fixture for 
each additional 50 
persons. 




Male Female 
1: 1-25 1: 1-25 
2: 26-50 2: 26-50 
Over 50, add 1 
fixture for each addi- 
tional 50 persons. 




1 per 150 12 


Elementary 


Male Female 
1 per 30 1 per 25 


Male 

1 per 75 


Male Female 
1 per 35 1 per 35 




1 per 150 12 


Secondary 


Male Female 
1 per 40 1 per 30 


Male 
1 per 35 


Male Female 
1 per 40 1 per 40 




1 per 150 12 


Others (colleges, 
universities, 
adult centers, 
etc.) 


Male Female 
1 per 40 1 per 30 


Male 
1 per 35 


Male Female 
1 per 40 1 per 40 




1 per 150 12 


Worship places 
educational and 
activities Unit 


Male Female 
1 per 150 1 per 75 


Male 
1 per 150 


1 per 2 water closets 




1 per 150 12 


Worship places 
principal assembly 
place 


Male Female 
1 per 150 1 per 75 


Male 
1 per 150 


1 per 2 water closets 




1 per 150 12 



38 



PLUMBING FIXTURES AND FIXTURE FITTINGS Table 4-1 continued 

1 The figures shown are based upon one (1) fixture being the minimum required for the number of persons indicated or any 
fraction thereof. 

2 Building categories not shown on this table shall be considered separately by the Authority Having jurisdiction. 

Drinking fountains shall not be installed in toilet rooms. 

4 Laundry trays. One (1) laundry tray or one (1) automatic washer standpipe for each dwelling unit or one (1) laundry tray or 
one (1) automatic washer standpipe, or combination thereof, for each twelve (12) apartments. Kitchen sinks, one (1) for each 
dwelling or apartment unit. 

3 For each urinal added in excess of the minimum required, one water closet shall be permitted to be deducted. The number of 
water closets shall not be reduced to less than two-thirds (2/3) of the minimum requirement. 

As required by PSAI Z4.1, Sanitation in Places of Employment. 

Where there is exposure to skin contamination with poisonous, infectious, or irritating materials, provide one (1) lavatory for 
each five (5) persons. 

8 Twenty-four (24) lineal inches (610 mm) of wash sink or eighteen (18) inches (457 mm) of a circular basin, when provided with 
water outlets for such space, shall be considered equivalent to one (1) lavatory. 

9 Laundry trays, one (1) for each fifty (50) persons. Service sinks, one (1) for each hundred (100) persons. 

General. In applying this schedule of facilities, consideration shall be given to the accessibility of the fixtures. Conformity 
purely on a numerical basis may not result in an installation suited to the needs of the individual establishment. For example, 
schools should be provided with toilet facilities on each floor having classrooms. 

a. Surrounding materials, wall, and floor space to a point two (2) feet (610 mm) in front of urinal lip and four (4) feet 
(1,219 mm) above the floor, and not less than two (2) feet (610 mm) to each side of the urinal shall be lined with non- 
absorbent materials. 

b. Trough urinals shall be prohibited. 

A restaurant is defined as a business that sells food to be consumed on the premises. 

a. The number of occupants for a drive-in restaurant shall be considered as equal to the number of parking stalls. 

b. Hand-washing facilities shall be available in the kitchen for employees. 

Where food is consumed indoors, water stations shall be permitted to be substituted for drinking fountains. Offices, or public 
buildings for use by more than six (6) persons shall have one (1) drinking fountain for the first one-hundred fifty (150) persons 
and one (1) additional fountain for each three-hundred (300) persons thereafter. 

There shall be at least one (1) drinking fountain per occupied floor in schools, theatres, auditoriums, dormitories, offices, or 
public buildings. 

The total number of water closets for females shall be equal to the total number of water closets and urinals required for males. 
This requirement shall not apply to Retail or Wholesale Stores. 

For smaller-type Public and Professional Offices such as banks, dental offices, law offices, real estate offices, architectural 
offices, engineering offices, and similar uses. A public area in these offices shall use the requirements for Retail or Wholesale 
Stores. 

Recreation or community room in multiple dwellings or apartment buildings, regardless or their occupant load, shall be 
permitted to have separate single-accommodation facilities in common-use areas within tracts or multi-family residential 
occupancies where the use of these areas is limited exclusively to owners, residents, and their guests. Examples are commu- 
nity recreation or multi-purpose areas in apartments, condos, townhouses, or tracts. 

A drinking fountain shall not be required in occupancies of 30 or less. When a drinking fountain is not required, then foot- 
notes 3, 12, and 13 are not applicable. 



39 



UNIFORM PLUMBING CODE 



40 



CHAPTER 5 

WATER HEATERS 



Parti 

501.0 General. 

The regulations of this chapter shall govern the 
construction, location, and installation of fuel- 
burning and other water heaters heating potable 
water, together with chimneys, vents, and their 
connectors. The minimum capacity for water heaters 
shall be in accordance with the first hour rating listed 
in Table 5-1. Design, construction, and workmanship 
shall be in conformity with accepted engineering 
practices, manufacturer's installation instructions, 
and applicable standards and shall be of such char- 
acter as to secure the results sought to be obtained by 
this code. No water heater shall be hereinafter 
installed that does not comply in all respects with the 
type and model of each size thereof approved by the 
Authority Having Jurisdiction. A list of accepted gas 
1 appliance standards are included in Table 14-1. 

502.0 Definitions. 

502.1 Appliance Categorized Vent Diameter/Area - 

The minimum vent area /diameter permissible for 
Category I appliances to maintain a nonpositive vent 
static pressure when tested in accordance with 
nationally recognized standards. [NFPA 54:3.3.7] 

502.2 Chimney - (See also Gas Vent, and Venting 
System.) One (1) or more passageways, vertical or 
nearly so, for conveying flue or vent gases to the 
outside atmosphere. [NFPA 54:3.3.17] 

502.3 Chimney, Factory-Built - A chimney 
composed of listed factory-built components assem- 
bled in accordance with the terms of listing to form 
the completed chimney. [NFPA 54:3.3.17.2] 

502.4 Chimney, Masonry - A field-constructed 
chimney of solid masonry units, bricks, stones, listed 
masonry chimney units, or reinforced portland 
cement concrete, lined with suitable chimney flue 
liners. [NFPA 54:3.3.17.3] 



502.5 Chimney, Metal - A field-constructed 
chimney of metal. [NFPA 54:3.3.17.4] 

502.6 Combustible Material - As pertaining to 
materials adjacent to or in contact with heat- 
producing appliances, vent connectors, gas vents, 
chimneys, steam and hot water pipes, and warm air 
ducts, shall mean materials made of or surfaced with 
wood, compressed paper, plant fibers, or other mate- 
rials that are capable of being ignited and burned. 
Such material shall be considered combustible even 
though flame-proofed, fire-retardant treated, or plas- 
tered. [NFPA 54:3.3.65.1] 

502.7 Direct-Vent Appliances - Appliances that are 
constructed and installed so that air for combustion 
is derived directly from the outside atmosphere and 
all flue gases are discharged to the outside atmo- 
sphere. [NFPA 54:3.3.6.3] 

502.8 Flue Collar - That portion of an appliance 
designed for the attachment of a draft hood, vent 
connector, or venting system. [NFPA 54:3.3.45] 

502.9 Gas Vent, Type B - A vent for venting-llsted 
gas appliances with draft hoods and other Category I 
appliances listed for use with Type B gas vents. 
[NFPA 54:3.3.105.2.2] 

502.10 Gas Vent, Type L - A vent for venting appli- 
ances listed for use with Type L vents and appliances 
listed for use with Type B gas vents. [NFPA 
54:3.3.105.2.4] 

502.11 Indirect-Fired Water Heater - A water 
heater consisting of a storage tank equipped with an 
internal or external heat exchanger used to transfer 
heat from an external source to heat potable water. 
The storage tank either contains heated potable 
water or water supplied from an external source, 
such as a boiler. 

502.12 Vent - A passageway used to convey flue 
gases from the gas utilization appliances or their 1 
vent connectors to the outside atmosphere. [NFPA 
54:3.3.103] 



TABLE 5-1 1 FIRST HOUR RATING 



Number of Bathrooms 


1 to 1.5 


2 to 2.5 


3 to 3.5 


Number of Bedrooms 


1 


2 


3 


2 


3 


4 


5 


3 


4 


5 


6 


First Hour Rating, 2 Gallons 


42 


54 


54 


54 


67 


67 


80 


67 


80 


80 


80 



Note: 

l 



The first hour rating is found on the "Energy Guide" label. 
"" Non-storage and solar water heaters shall be sized to meet the appropriate first hour rating as shown in the table. 



41 



502.13-505.6 



UNIFORM PLUMBING CODE 



502.13 Vent Connector - The pipe or duct that 
connects a fuel-gas-burning appliance to a vent or 
chimney. [NFPA 54:3.3.106] 

502.14 Venting System - A continuous open 
passageway from the flue collar or draft hood of a 
gas-burning appliance to the outside atmosphere for 
the purpose of removing flue or vent gases. [NFPA 
54:3.3.96.6] 

502.15 Water Heater - An appliance for supplying 
hot water for domestic or commercial purposes. 
[NFPA 54:3.3.55.7] 

503.0 Permits. 

It shall be unlawful for any person to install, remove, 
or replace or cause to be installed, removed, or 
replaced any water heater without first obtaining a 
permit from the Authority Having Jurisdiction to do 
so. 

504.0 Inspection. 

504.1 Inspection of Chimneys or Vents. This 
inspection shall be made after all chimneys, vents, or 
parts thereof, authorized by the permit, have been 
installed and before any such vent or part thereof has 
been covered or concealed. 

504.2 Final Water Heater Inspection. This inspec- 
tion shall be made after all work authorized by the 
permit has been installed. The Authority Having 
Jurisdiction will make such inspection as deemed 
necessary to be assured that the work has been 
installed in accordance with the intent of this code. 

| No appliance or part thereof shall be covered or 
concealed until the same has been inspected and 
approved by the Authority Having Jurisdiction. 

505.0 Water Heater Requirements. 

505.1 Location. Water heater installations in bed- 
rooms and bathrooms shall comply with one of the 
following [NFPA 54:10.28.1]: 

(1) Fuel-burning water heaters may be installed in a 
closet located in the bedroom or bathroom 
provided the closet is equipped with a listed, 
gasketed door assembly and a listed self-closing 
device. The self-closing door assembly shall meet 
the requirements of Section 505.1.1. The door 
assembly shall be installed with a threshold and 
bottom door seal and shall meet the require- 
ments of Section 505.1.2. All combustion air for 
such installations shall be obtained from the 
outdoors in accordance with Section 507.4. The 
closet shall be for the exclusive use of the water 
heater. 

(2) Water heater shall be of the direct vent type. 
[NFPA 54:10.28.1(2)] 



505.1.1 Self-Closing Doors. Self-closing doors 
shall swing easily and freely and shall be 
equipped with a self-closing device to cause the 
door to close and latch each time it is opened. 
The closing mechanism shall not have a hold- 
open feature. [NFPA 80:6.1.4.2] 

505.1.2 Gasketing. Gasketing on gasketed 
doors or frames shall be furnished only in accor- 
dance with the published listings of the door, 
frame, or gasketing material manufacturer. 
[NFPA 80:6.4.8] 

Exception: Where acceptable to the 
Authority Having Jurisdiction, gasketing of 
non-combustible or limited-combustible 
material (see NFPA 220, Standard on Types of 
Building Construction) shall be permitted to 
be applied to the frame, provided closing 
and latching of the door are not inhibited. 

505.2 Water heaters of other than the direct-vent 
type shall be located as close as practical to the 
chimney or gas vent. [NFPA 54:9.28.1.2] 

505.3 Clearance. 

505.3.1 The clearances shall not be such as to 
interfere with combustion air, draft hood clear- 
ance and relief, and accessibility for servicing. 
Listed water heaters shall be installed in accor- 
dance with their listings and the manufacturer's 
instructions. [NFPA 54:10.28.2.1] 

505.3.2 Unlisted water heaters shall be installed 
with a clearance of twelve (12) inches (300 mm) 
on all sides and rear. Combustible floors under 
unlisted water heaters shall be protected in an 
approved manner. [NFPA 54:10.28.2.2] 

505.4 Pressure-Limiting Devices. A water heater 
installation shall be provided with overpressure 
protection by means of an approved, listed device, 
installed in accordance with the terms of its listing 
and the manufacturer's instructions. [NFPA 
54:10.28.3] 

505.5 Temperature-Limiting Devices. A water 
heater installation or a hot water storage vessel 
installation shall be provided with over temperature 
protection by means of an approved, listed device 
installed in accordance with the terms of its listing 
and the manufacturer's instructions. [NFPA 54:10.28.4] 

505.6 Temperature, Pressure, and Vacuum Relief 
Devices. The installation of temperature, pressure, 
and vacuum relief devices or combinations thereof, 
and automatic gas shutoff devices, shall be installed 
in accordance with the terms of their listings and the 
manufacturer's instructions. A shutoff valve shall 
not be placed between the relief valve and the water 
heater or on discharge pipes between such valves 
and the atmosphere. The hourly Btu discharge 
capacity or the rated steam relief capacity of the 



42 



WATER HEATERS 



505.6-507.1 



device shall be not less than the input rating of the 
water heater. [NFPA 54:10.28.5] 

506.0 Oil-Burning and Other Water Heaters. 

506.1 Water heaters deriving heat from fuels or types of 
energy other than gas shall be constructed and installed 
in accordance with approved standards. Vents or chim- 
neys for such appliances shall be approved types. An 
adequate supply of air for combustion and for 
adequate ventilation of heater rooms or compartments 
shall be provided. Each such appliance shall be 
installed in a location approved by the Authority 
Having Jurisdiction and local and state fire-preven- 
tion agencies. 

506.2 Storage-type water heaters and hot water 
boilers deriving heat from fuels or types of energy 
other than gas, shall be provided with, in addition to 
the primary temperature controls, an over tempera- 
ture safety protection device constructed, listed, and 
installed in accordance with nationally recognized 
applicable standards for such devices and a combi- 
nation temperature and pressure-relief valve. 

506.3 Oil-fired water heaters shall be installed in 
accordance with NFPA 31, Standard for the Installation 
of Oil-Burning Equipment. 

506.4 Indirect-Fired Water Heaters. 

506.4.1 Indirect-fired water heaters shall 
conform to applicable sections of the ASME 
Boiler and Pressure Vessel Code, or to one (1) of the 
other applicable standards shown in Table 14-1. 
Each water heater shall bear a label in accor- 
dance with ASME requirements, or an approved 
testing agency, certifying and attesting that such 

| an appliance has been tested, inspected and 
meets the requirements of the applicable stan- 
dards or code. 

506.4.2 Indirect-fired water heater that incorpo- 
rate a single-wall heat exchanger shall meet all 
of the following requirements: 

(1) Connected to a low-pressure hot water 
boiler limited to a maximum of thirty (30) 
psig by an approved safety or relief valve. 

(2) Heater transfer medium is either potable 
water or contains fluids having a toxicity 
rating or Class of 1. 

(3) Bear a label with the word "Caution/ 7 
followed by the following statements: 

(a) The heat-transfer medium must be 
water or other nontoxic fluid having a 
toxic rating or Class of 1 as listed in 
Clinical Toxicology of Commercial 
Products, 5th edition. 

(b) The pressure of the heat-transfer 
medium must be limited to a maximum 
of thirty (30) psig (207 kPa) by an 
approved safety or relief valve. 



Note: The word "Caution" and the 
statements in letters having an 
uppercase height of not less than 
0.120 of an inch (3.0 mm). The vertical 
spacing between lines of type shall 
be not less than 0.046 of an inch (1.2 
mm). Lowercase letters shall be 
compatible with the uppercase 
letter size specification. 

507.0 Air for Combustion and Ventilation. 

507.1 General. 

507.1.1 Air for combustion, ventilation, and dilu- 
tion of flue gases for gas utilization appliances | 
installed in buildings shall be obtained by applica- 
tion of one (1) of the methods covered in Sections 

507.2.1 through 507.7. Gas utilization appliances of 
other than natural draft and Category I vented 
appliances shall be provided with combustion, | 
ventilation, and dilution air in accordance with the 
appliance manufacturer's instructions. Where infil- 
tration does not provide the necessary air, outdoor 
air shall be introduced in accordance with methods 
covered in Sections 507.4 through 507.7. [NFPA 
54:9.3.1.1] 

Exception No. 1: This provision shall not 
apply to direct-vent appliances. 
Exception No. 2: Type 1 clothes dryers that 
are provided with make-up air in accordance 
with section NFPA 54:10.4.3. 

507.1.1.1 Clothes Dryer. A device used to 
dry wet laundry by means of heat derived 
from the combustion of fuel gases. [NFPA 
54:3.3.18] 

507.1.1.2 Clothes Dryer, Type 1. Primarily 
used in family living environment. May or 
may not be coin-operated for public use. 
[NFPA 54:3.3.18.1] 

507.1.1.3 Exhausting to the Outdoors. 

Type 1 and Type 2 clothes dryers shall be 
exhausted to the outside air. [NFPA 54:10.4.2] 

507.1.1.4 Provisions for Make-Up Air. 

Make-up air shall be provided for Type 1 
clothes dryers in accordance with the manu- 
facturer's installation instructions. [NFPA 
54:10.4.3.1] 

507.1.2 Gas appliances of other than natural 
draft design and other than Category I vented 
appliances shall be provided with combustion, 
ventilation, and dilution air in accordance with 
the appliance manufacturer's instructions. 
[NFPA 54:9.3.1.2] 



43 



507.1 -507.4 



UNIFORM PLUMBING CODE 



507.1.3 Where used, a draft hood or a baro- 
metric draft regulator shall be installed in the 

| same room or enclosure as the appliance served 

so as to prevent any difference in pressure 
between the hood or regulator and the combus- 
tion air supply. [NFPA 54:9.3.1.4] 

507.1.4 Makeup air requirements for the opera- 
tion of exhaust fans, kitchen ventilation systems, 
clothes dryers, and fireplaces shall be considered 
in determining the adequacy of a space to 
provide combustion air requirements. [NFPA 
54:9.3.1.5] 

507.2 Indoor Combustion Air. The required volume 
of indoor air shall be determined in accordance with 
Sections 507.2.1 or 507.2.2 except that where the air 
infiltration rate is known to be less than 0.40 ACH, 
Section 507.2.2 shall be used. The total required 
volume shall be the sum of the required volume 
calculated for all appliances located within the space. 
Rooms communicating directly with the space in 
which the appliances are installed through openings 
not furnished with doors, and through combustion 
air openings sized and located in accordance with 
Section 507.3 are considered a part of the required 
volume. [NFPA 54:9.3.2] 

507.2.1 Standard Method. The required volume 
shall be not less than fifty (50) cubic feet per 
1,000 Btu/hour (4.8 m 3 /kW). [NFPA 54:9.3.2.1] 

507.2.2 Known Air Infiltration Rate Method. 

Where the air infiltration rate of a structure is 
known, the minimum required volume shall be 
determined as follows [NFPA 54:9.3.2.2]: 

(1) For appliances having other than fan- 
assisted, combustion systems: calculate 
using Equation 5-1 but not less than thirty- 
five (35) cubic feet per 1,000 Btu/hour (3 A 
m7kW). [NFPA 54:9.3.2.2(1)] 

(2) For fan-assisted combustion system appli- 
ances, calculate using Equation 5-2 but not 
less than twenty-five (25) cubic feet per 
1,000 Btu/hour (2.4 m 3 /kW). [NFPA 54: 
9.3.2.2(2)] 

Equation 5-1: 

Required volume Qther > ( 21 ft 3 /ACH) x ( 1^/^/1,000 Btu/h) 

Equation 5-2: 

Required volume f an > ( 15 ft 3 / ACH) x ( \f m / 1,000 Btu / h) 

Where: 

l fj ier = All Appliances other than fan-assisted 
Input in Btu/hour 

* fan = Fan-assisted appliance input in Btu / hour 

ACH = Air change per hour (Percent of volume 

of space exchanged per hour, expressed 

as a decimal) 



507.3 Indoor Opening Size and Location. Open- 
ings used to connect indoor spaces shall be sized and 
located in accordance with the following [NFPA 
54:9.3.2.3]: 

(1) Combining spaces on the same story. Each opening 
shall have a free area of not less than one (1) 
square inch / 1,000 Btu/h (2,200 mm 2 /kW) of the 
total input rating of all gas utilization appliances | 
in the space, but not less than one-hundred (100) 
square inches (0.06 m 2 ). One (1) opening shall 
commence within twelve (12) inches (300 mm) of 
the top, and one (1) opening shall commence 
within twelve (12) inches (300 mm) of the 
bottom of the enclosure [see Figure 5-7]. The 
dimension of air openings shall be not less than 
three (3) inches (80 mm). [NFPA 54:9.3.2.3(1)] 1 

(2) Combining spaces in different stories. The volumes 
of spaces in different stories shall be considered 
as communicating spaces where such spaces are 
connected by one (1) or more openings in doors 
or floors having a total free area of not less than 
two (2) square inches/1,000 Btu/h (4,400 
mrrr/kW) of total input rating of all gas utiliza- 
tion appliances. [NFPA 54:9.3.2.3(2)] 1 

507.4 Outdoor Combustion Air. Outdoor combus- 
tion air shall be provided through opening(s) to the 
outdoors in accordance with methods Sections 507.4.1 
or 507.4.2. The dimension of air openings shall be not 
less than three (3) inches (80 mm). [NFPA 54:9.3.3] 

507.4.1 Two Permanent Openings Method. Two 

(2) permanent openings, one (1) commencing 
within twelve (12) inches (300 mm) of the top 
and one (1) commencing within twelve (12) 
inches (300 mm) of the bottom of the enclosure 
shall be provided. The openings shall communi- 
cate directly, or by ducts, with the outdoors or 
spaces that freely communicate with the 
outdoors as follows [NFPA 54:9.3.3.1]: 

(1) Where directly communicating with the 
outdoors or where communicating to the 
outdoors through vertical ducts, each 
opening shall have a free area of not less 
than one (1) square inch/ 4000 Btu/h (550 
mm 2 /kW) of total input rating of all appli- | 
ances in the enclosure. [See Figures 5-8 and 
5-9.] [NFPA 54:9.3.3.1(1)] 

(2) Where communicating with the outdoors 
through horizontal ducts, each opening shall 
have a free area of not less than one (1) square 
inch/2,000 Btu/h (1,100 mnr/kW) of total 
input rating of all appliances in the enclosure. | 
[See Figure 5-10] [NFPA 54:9.3.3.1(2)] 



44 



WATER HEATERS 



507.4 - 507.9 



507.4.2 One Permanent Opening Method. One 

(1) permanent opening, commencing within 
twelve (12) inches (300 mm) of the top of the 
| enclosure, shall be provided. The appliance shall 

have clearances of not less than one (1) inch (25 
mm) from the sides and back and six (6) inches 
(160 mm) from the front of the appliance. The 
opening shall directly communicate with the 
outdoors or shall communicate through a 
vertical or horizontal duct to the outdoors or 
spaces that freely communicate with the 
outdoors [see Figure 5-11] and shall have a 
minimum free area of the following [NFPA 
54:9.3.3.2]: 

(1) One (1) square inch/3,000 Btu/h (700 
mnr/kW) of the total input rating of all 

| appliances located in the enclosure, and 

[NFPA 54:9.3.3.2(1)] 

(2) Not less than the sum of the areas of all vent 
connectors in the space. [NFPA 54:9.3.3.2(2)] 

507.5 Combination Indoor and Outdoor Combus- 
tion Air. The use of a combination of indoor and 
outdoor combustion air shall be in accordance with 
Sections 507.5.1, 507.5.2 and 507.5.3 [see example 
calculation in NFPA 54 Annex J and this chapter - 
Part II] [NFPA 54:9.3.4]. 

507.5.1 Indoor Openings. Where used, open- 
ings connecting the interior spaces shall comply 
with Section 507.3. [NFPA 54:9.3.4(1)] 

507.5.2 Outdoor openings shall be located in 
accordance with Sections 507.4.1 or 507.4.2. 
[NFPA 54:9.3.4(2)] 

507.5.3 Outdoor Openings Size. The outdoor 
openings size shall be calculated in accordance 
with the following [NFPA 54:9.3.4(3)]: 

(1) The ratio of interior spaces shall be the avail- 
able volume of communicating spaces 
divided by the required volume. 

(2) The outdoor size reduction factor shall be 
one (1) minus the ratio of interior spaces. 

(3) The minimum size of outdoor openings shall 
be the full size of outdoor openings calcu- 
lated in accordance with Sections 507.4.1 or 
507.4.2, multiplied by the reduction factor. 
The dimension of air openings shall be not 
less than three (3) inches (80 mm). [NFPA 
54:9.3.4(3)(c)] 

507.6 Engineered Installations. Engineered 
combustion air installations shall provide an 
adequate supply of combustion, ventilation, and 
dilution air and shall be approved by the Authority 
Having Jurisdiction. [NFPA 54:9.3.5] 



507.7 Mechanical Combustion Air Supply. Where 
combustion air is provided by a mechanical air 
supply system, the combustion air shall be supplied 
from outdoors at the minimum rate of 0.35 cubic 
feet/min per 1,000 Btu/h (0.034 mVmin per kW) for 
appliances located within the space. [NFPA 54:9.3.6] 

507.7.1 Where exhaust fans are installed, addi- 
tional air shall be provided to replace the 
exhausted air. [NFPA 54:9.3.6.1] 

507.7.2 Each of the appliances served shall be 
interlocked to the mechanical air supply system 
to prevent main burner operation where the 
mechanical air supply system is not in operation. 
[NFPA 54:9.3.6.2] 

507.7.3 Where combustion air is provided by 
the building's mechanical ventilation system, the 
system shall provide the specified combustion 
air rate in addition to the required ventilation 
air. [NFPA 54:9.3.6.3] 

507.8 Louvers, Grilles and Screens. 

(A) Louvers and Grilles. The required size of open- 
ings for combustion, ventilation, and dilution air 
shall be based on the net free area of each 
opening. Where the free area through a design of 
louver or grille is known, it shall be used in 
calculating the size opening required to provide 
the free area specified. Where the design and 
free area are not known, it shall be assumed that 
wood louvers will have 25 percent free area and 
metal louvers and grilles will have 75 percent 
free area. Nonmotorized louvers and grilles shall 
be fixed in the open position. [NFPA 54:9.3.7.1] 

(B) Minimum Screen Mesh Size. Screens shall be 
not less than one-fourth (1/4) inch mesh. [NFPA 
54:9.3.7.2] 

(C) Motorized louvers shall be interlocked with the 
appliance so they are proven in the full open | 
position prior to main burner ignition and during 
main burner operation. Means shall be provided 
to prevent the main burner from igniting should 
the louver fail to open during burner start-up 
and to shut down the main burner if the louvers 
close during burner operation. [NFPA 54:9.3.7.3] 

507.9 Combustion Air Ducts. Combustion air ducts 
shall comply with the following: 

(1) Ducts shall be of galvanized steel or a material 
having equivalent corrosion resistance, strength, 
and rigidity. [NFPA 54:9.3.8.1] 

Exception: Within dwelling units, unob- 
structed stud and joist spaces shall not be 
prohibited from conveying combustion air, 
provided that not more than one (1) fire- 
block is removed. 



45 



507.9 - 508.8 



UNIFORM PLUMBING CODE 



(2) Ducts shall terminate in an unobstructed space, 
allowing free movement of combustion air to the 
appliances. [NFPA 54:9.3.8.2] 

(3) Ducts shall serve a single space. [NFPA 
54:9.3.8.3] 

(4) Ducts shall not service both upper and lower 
combustion air openings where both such open- 
ings are used. The separation between ducts 
serving upper and lower combustion air open- 
ings shall be maintained to the source of 
combustion air. [NFPA 54:9.3.8.4] 

(5) Ducts shall not be screened where terminating in 
an attic space. [NFPA 54:9.3.8.5] 

(6) Intakes for combustion air ducts located exterior 
to the building shall have the lowest side of the 
combustion air intake openings located at least 
twelve (12) inches (300 mm) vertically from the 

I adjoining finished grade level. 

(7) Horizontal upper combustion air ducts shall 
not slope downward toward the source of 
combustion air. [NFPA 54:9.3.8.6] 

(8) The remaining space surrounding a chimney 
liner, gas vent special gas vent, or plastic piping 
installed within a masonry chimney flue 7 metal 
or factory-built chimney, shall not be used to 
supply combustion air [NFPA 54:9.3.8.7], unless 
it is listed and shown in the manufacturer's 
installation instructions. 

508.0 Other Water Heater installation Requirements. 

508.1 The Authority Having Jurisdiction shall have 
the authority to require the use of an approved 
dielectric insulator on the water piping connections 

| of water heaters and related water heating appliances. 

508.2 In seismic design categories C, D, E, and F, 
water heaters shall be anchored or strapped to resist 
horizontal displacement due to earthquake motion. 
Strapping shall be at points within the upper one- 
third (1/3) and lower one-third (1/3) of its vertical 
dimensions. At the lower point, a distance of not less 
than four (4) inches (102 mm) shall be maintained 
above the controls with the strapping. 

508.3 A water heater supported from the ground 
shall rest on level concrete or other approved base 
extending not less than three (3) inches (76 mm) 
above the adjoining ground level. 

508.4 When a water heater is located in an attic, 
attic-ceiling assembly, floor-ceiling assembly, or 
floor-subfloor assembly where damage results from 
a leaking water heater, a water-tight pan of corro- 
sion-resistant materials shall be installed beneath the 
water heater with not less than three-quarters (3/4) 
of an inch (20 mm) diameter drain to an approved 
location. 



508.5 Relief Valve Discharge. 

Discharge from a relief valve into a water heater pan 
shall be prohibited. 

508.6 Added or Converted Appliances. When an 
additional or replacement appliance is installed or an 
appliance is converted to gas from another fuel, the | 
location in which the appliance is to be operated 
shall be checked to verify the following [NFPA 
54:9.1.2]: 

508.6.1 Air for combustion and ventilation is 
provided where required, in accordance with the 
provisions of Section 507.0. Where existing facili- 
ties are not adequate, they shall be upgraded to 
Section 507.0 specifications. [NFPA 54:9.1.2(1)] 

508.6.2 The installation components and appli- 
ances meet the clearances to combustible material 
provisions of NFPA 54:9.2.2. It shall be deter- 
mined that the installation and operation of the 
additional or replacement appliance does not 1 
render the remaining appliance unsafe for J 
continued operation. [NFPA 54:9.1.2(2)] 

(The following reference was extracted from NFPA 54.) 

92.2 Clearance to Combustible Materials. Appliances | 
and their vent connectors shall be installed with 
clearances from combustible material so their opera- 
Hon will not create a hazard to persons or property. 
Minimum clearances between combustible walls and 
the back and sides of various conventional types of 
appliances and their .vent connectors are specified in 1 
Chapters 10 and 12. (Reference can also be made to j 
NFPA 211, Standard for Chimneys, Fireplaces, 
Vents, and Solid Fuel-Burning Appliances.) 

508.6.3 The venting system is constructed and 
sized in accordance with the provisions of this 
chapter. Where the existing venting system is 
not adequate, it shall be upgraded to comply 
with this chapter. [NFPA 54:9.1.2(3)] 

508.7 Types of Gases. It shall be determined 
whether the gas-utilization appliance has been | 
designed for use with the gas to which it will be 
connected. No attempt shall be made to convert the 
appliance from the gas specified on the rating plate 1 
for use with a different gas without consulting the 
installation instructions, the serving gas supplier, or 
the appliance manufacturer for complete instruc- [ 
tions. [NFPA 54:9.1.3] 

508.8 Safety Shutoff Devices for Unlisted LP-Gas 
Appliance Used Indoors. Unlisted gas utilization I 
appliances for use with undiluted liquefied | 
petroleum gases and installed indoors shall be 
equipped with safety shutoff devices of the complete 
shutoff type. [NFPA 54:9.1.4] 



46 



WATER HEATERS 



508.9-508.15 



508.9 Use of Air or Oxygen Under Pressure. 

Where air or oxygen under pressure is used in 
connection with the gas supply, effective means such 
as a back-pressure regulator and relief valve shall be 
provided to prevent air or oxygen from passing back 
into the gas piping. Where oxygen is used, installa- 
tion shall be in accordance with NFPA 51, Standard 
for the Design and Installation of Oxygen-Fuel Gas 
Systems for Welding, Cutting, and Allied Processes. 
[NFPA 54:9.1.5] 

508.10 Protection of Gas Appliances from Fumes 
or Gases Other than Products of Combustion. 

Non-direct vent-type gas appliances installed in 
beauty shops, barbershops, or other facilities where 
chemicals that generate corrosive or flammable 
products such as aerosol sprays are routinely used 
shall be located in an equipment room separate or 
partitioned off from other areas with provisions for 
combustion and dilution air from outdoors. Direct 
| vent appliances shall be installed in accordance with 
the appliance manufacturer's installation instruc- 
tions. [NFPA 54:9.1.6.2] 

508.11 Process Air. In addition to air needed for 
combustion in commercial or industrial processes, 
process air shall be provided as required for cooling 
of equipment or material, controlling dew point, 
heating, drying, oxidation, dilution, safety exhaust, 
odor control, air for compressors, and for comfort 
and proper working conditions for personnel. 
[NFPA 54:9.1.7] 

508.12 Building Structural Members. 

508.12.1 Structural members of a building shall 
| not pass through gas utilization appliances 

having an operating temperature exceeding 
500°F (260°C). [NFPA 54:9.1.8.1] 

508.12.2 Structural members passing through 
| gas utilization appliances having an operating 

temperature of 500°F (260°C) or less shall be of 
noncombustible material. Building columns, 
girders, beams, or trusses shall not be installed 
| within appliances, unless insulation and ventila- 

tion are provided to avoid deterioration in 
strength and linear expansion of the building 
structure in either a vertical or a horizontal 
direction. [NFPA 54:9.1.8.2] 

| 508.12.3 Gas utilization appliances shall be 

furnished either with load-distributing bases or 
with a sufficient number of supports to prevent 

| damage to either the building structure or appli- 

ance. [NFPA 54:9.1.8.3] 

508.12.4 At the locations selected for installation 
| of the gas utilization appliance, the dynamic and 

static load-carrying capacities of the building 
structure shall be checked to determine whether 
they are adequate to carry the additional loads. 



The appliance shall be supported and shall be | 
connected to the piping so as not to exert undue 
stress on the connections. [NFPA 54:9.1.8.4] 

508.13 Flammable Vapors. Gas appliances shall not 
be installed in areas where the open use, handling, or 
dispensing of flammable liquids occurs, unless the 
design, operation, or installation reduces the poten- 
tial of ignition of the flammable vapors. Gas utiliza- 
tion appliances installed in compliance with Sections I 
508.14, 508.15, or 508.16 shall be considered to 
comply with the intent of this provision. [NFPA 
54:9.1.9] 

508.14 Installation in Residential Garages. 

(1) Gas utilization appliances in residential garages | 
and in adjacent spaces that open to the garage 
and are not part of the living space of a dwelling 
unit shall be installed so that burners and 
burner-ignition devices are located not less than 
eighteen (18) inches (450 mm) above the floor 
unless listed as flammable vapor ignition resis- 
tant. [NFPA 54:9.1.10.1] 

(2) Such appliances shall be located or protected so | 
it is not subject to physical damage by a moving 
vehicle. [NFPA 54:9.1.10.2] 

(3) When appliances are installed in a separate 
enclosed space having access only from outside 
of the garage, such appliances shall be permitted 1 
to be installed at floor level, providing the 
required combustion air is taken from the exte- 
rior of the garage. [NFPA 54:9.1.10.3] 

508.15 Installation in Commercial Garages. 

508.15.1 Parking Structures. Gas utilization 
appliances installed in enclosed, basement, and | 
underground parking structures shall be 
installed in accordance with NFPA 88A, Standard 
for Parking Structures. [NFPA 54:9.1.11.1] 

508.15.2 Repair Garages. Gas utilization appli- | 
ances installed in repair garages shall be 
installed in a detached building or room, sepa- 
rated from repair areas by walls or partitions, 
floors, or floor-ceiling assemblies that are 
constructed so as to prohibit the transmission of 
vapors and having a fire-resistance rating of not 
less than one (1) hour, and that have no open- 
ings in the wall separating the repair area within 
eight (8) feet (2.5 m) of the floor. Wall penetra- 
tions shall be fire-stopped. Air for combustion 
purposes shall be obtained from outside the 
building. The heating room shall not be used for 
the storage of combustible materials. [NFPA 
54:9.1.11.2] 

Exception No. 1: Overhead heaters where 
installed not less than eight (8) ft (2.5 m) 
above the floor shall be permitted. 



47 



508.15-508.24 



UNIFORM PLUMBING CODE 



| Exception No. 2: Heating appliances for 

vehicle repair areas where there is no 
dispensing or transferring of Class I or Class 
II flammable or combustible liquids or lique- 
fied petroleum gas shall be installed in 
accordance with NFPA 30 A, Code for Motor 
Fuel Dispensing Facilities and Repair Garages. 
[NFPA 54:9.1.11.2] 

508.16 Installation in Aircraft Hangars. Heaters in 
aircraft hangars shall be installed in accordance with 
NFPA 409, Standard on Aircraft Hangars. [NFPA 
54:9.1.12] 
I 508.17 Gas Appliance Physical Protection. Where 
| it is necessary to locate gas utilization appliances 
close to a passageway traveled by vehicles or equip- 
ment, guardrails or bumper plates shall be installed 
to protect the appliance from damage. [NFPA 
54:9.1.13] 

508.18 Venting of Flue Gases. Gas utilization 

| appliances shall be vented in accordance with the 
provisions of this chapter and NFPA 54, Chapter 12. 
[NFPA 54:9.1.14] 

508.19 Extra Device or Attachment. No device or 
attachment shall be installed on any gas utilization 

| appliance that could in. any way impair the combus- 
tion of gas. [NFPA 54:9.1.15] 

508.20 Adequate Capacity of Piping. When addi- 
| tional gas utilization appliances are being connected 

to a gas piping system, the existing piping shall be 
checked to determine if it has adequate capacity. (See 
Section 1209.4.3.) Where inadequate, the existing 
system shall be enlarged as necessary, or separate 
gas piping of adequate capacity shall be run from the 
| point of delivery to the appliance. [NFPA 54:9.1.16] 

508.21 Avoiding Strain on Gas Piping. Gas utiliza- 
| tion appliances shall be supported and so connected 

to the piping as not to exert undue strain on the 
connections. [NFPA 54:9.1.17] 

508.22 Gas Appliance Pressure Regulators. 

Where the gas supply pressure exceeds that at which 
| the gas utilization appliance is designed to operate 

or varies beyond the design pressure limits of the 
| appliance, a gas appliance pressure regulator shall be 

installed. [NFPA 54:9.1.18] 

508.23 Venting of Gas Appliance Pressure Regu- 
lators. Venting of gas appliance pressure regulators 
shall comply with the following requirements 
[NFPA 54:9.1.19]: 

508.23.1 Gas appliance pressure regulators 
requiring access to the atmosphere for successful 
operation shall be equipped with vent piping 
leading outdoors or, if the regulator vent is an 
| integral part of the appliance, into the combus- 

tion chamber adjacent to a continuous pilot, 



unless constructed or equipped with a vent 
limiting means to limit the escape of gas from 
the vent opening in the event of diaphragm 
failure. [NFPA 54:9.1.19(1)] 

508.23.2 Vent limiting means shall be employed 
on listed gas appliance pressure regulators only. 
[NFPA 54:9.1.19(2)] 

508.23.3 In the case of vents leading outdoors, 
means shall be employed to prevent water from 
entering this piping and also to prevent blockage 
of vents by insects and foreign matter. [NFPA 
54:9.1.19(3)] 

508.23.4 Under no circumstances shall a regulator 
be vented to the gas utilization appliance flue or 
exhaust system. [NFPA 54:9.1.19(4)] 

508.23.5 In the case of vents entering the 
combustion chamber, the vent shall be located so 
the escaping gas will be readily ignited by the 
pilot and the heat liberated thereby will not 
adversely affect the normal operation of the 
safety shutoff system. The terminus of the vent 
shall be securely held in a fixed position relative 
to the pilot. For manufactured gas, the need for a 
flame arrester in the vent piping shall be deter- 
mined. [NFPA 54:9.1.19(5)] 

508.23.6 Vent lines from a gas appliance pres- 
sure regulator and bleed lines from a diaphragm- 
type valve shall not be connected to a common 
manifold terminating in a combustion chamber. 
Vent lines shall not terminate in positive-pres- 
sure-type combustion chambers. [NFPA 
54:9.1.19(6)] 

508.24 Bleed Lines for Diaphragm-Type Valves. 

Bleed lines shall comply with the following require- 
ments [NFPA 54:9.1.20]: 

508.24.1 Diaphragm-type valves shall be 
equipped to convey bleed gas to the outside 
atmosphere or into the combustion chamber adja- 
cent to a continuous pilot. [NFPA 54:9.1.20(1)] 

508.24.2 In the case of bleed lines leading 
outdoors, means shall be employed to prevent 
water from entering this piping and also to 
prevent blockage of vents by insects and foreign 
matter. [NFPA 54:9.1.20(2)] 

508.24.3 Bleed lines shall not terminate in the 
gas utilization appliance flue or exhaust system. | 
[NFPA 54:9.1.20(3)] 

508.24.4 In the case of bleed lines entering the 
combustion chamber, the bleed line shall be 
located so the bleed gas will be readily ignited 
by the pilot and the heat liberated thereby will 
not adversely affect the normal operation of the 
safety shutoff system. The terminus of the bleed 



48 



WATER HEATERS 



508.24 - 509.3 



line shall be securely held in a fixed position 
relative to the pilot. For manufactured gas, the 
need for a flame arrester in the bleed line piping 
shall be determined. [NFPA 54:9.1.20(4)] 

508.24.5 Bleed lines from a diaphragm-type 
valve and vent lines from a gas appliance pres- 
sure regulator shall not be connected to a 
common manifold terminating in a combustion 
chamber. Bleed lines shall not terminate in posi- 
tive-pressure-type combustion chambers. [NFPA 
54:9.1.20(5)] 

I 508.25 Combination of Appliances. Any combina- 

| tion of gas utilization appliances, attachments, or 
devices used together in any manner shall comply 
with the standards that apply to the individual 
appliance. [NFPA 54:9.1.21] 

508.26 Installation Instructions. The installing 

| agency shall conform with the appliance manufactur- 
er's recommendations in completing an installation. 
The installing agency shall leave the manufacturer's 
installation, operating, and maintenance instructions 
in a location on the premises where they will be 
readily available for reference and guidance for the 
Authority Having Jurisdiction, service personnel, and 
the owner or operator. [NFPA 54:9.1.22] 

| 508.27 Protection of Outdoor Appliances. Gas 

| utilization appliances not listed for outdoor installa- 
tion but installed outdoors shall be provided with 
protection to the degree that the environment 

| requires. Appliances listed for outdoor installation 
shall be permitted to be installed without protection 
in accordance with the provisions of its listing. (See 
NFPA 54:9.2.1.) [NFPA 54:9.1.23] 

(The following references were extracted from NFPA 54.) 

9.2 Accessibility and Clearance. 

| 9.2.1 Accessibility for Service. Gas utilization appli- 
ances shall be located with respect to building 
construction and other equipment so as to permit 

| access to the gas utilization appliance. Sufficient 
clearance shall be maintained to permit cleaning of 
heating surfaces; the replacement^ of filters, blowers, 
motors, burners, controls, and vent connections; the 
lubrication of moving parts where necessary; the 
adjustment and cleaning of burners and pilots; and 
the proper functioning of explosion vents, if provided. 
For attic installation, the passageway and servicing 

| area adjacent to the appliance shall be floored. 

I 509.0 Appliances on Roofs. 

509.1 General. 

| (1) Gas utilization appliances on roofs shall be 
designed or enclosed so as to withstand 



climactic conditions in the area in which they are 
installed. Where enclosures are provided, each 
enclosure shall permit easy entry and move- 
ment, shall be of reasonable height, and shall 
have not less than a thirty (30) inch (760 mm) 
clearance between the entire service access 
panel(s) of the appliance and the wall of the | 
enclosure. [NFPA 54:9.4.1.1] 

(2) Roofs on which an appliance is to be installed I 
shall be capable of supporting the additional 
load or shall be reinforced to support the addi- 
tional load. [NFPA 54:9.4.1.2] 

(3) All access locks, screws, and bolts shall be of 
corrosion-resistant material. [NFPA 54:9.4.1.3] 

509.2 Installation of Appliances on Roofs. ' 

(1) Gas utilization appliances shall be installed in | 
accordance with its listing and the manufactur- 
er's installation instructions. [NFPA 54:9.4.2.1] 

(2) Appliances shall be installed on a well-drained | 
surface of the roof. Not less than six (6) feet (1.8 
m) of clearance shall be available between any 
part of the appliance and the edge of a roof or | 
similar hazard, or rigidly fixed rails, guards, 
parapets, or other building structures not less 
than forty-two (42) inches (1.1 m) in height shall 
be provided on the exposed side. [NFPA 
54:9.4.2.2] 

(3) Appliances requiring an external source of elec- I 
trical power for its operation shall be provided 
with (1) a readily accessible electrical discon- 
necting means within sight of the appliance that I 
will completely de-energize the appliance, and I 
(2) a 120- VAC grounding-type receptacle outlet 
on the roof adjacent to the appliance. The recep- I 
tacle outlet shall be on the supply side of the 
disconnect switch. [NFPA 54:9.4.2.3] 

(4) Where water stands on the roof of the appliance I 
or in the passageways to the appliance, or where I 
the roof is of a design having a water seal, a suit- 
able platform, walkway, or both shall be 
provided above the waterline. Such platforms or 
walkways shall be located adjacent to the appli- I 
ance and control panels so that the appliance can I 
be safely serviced where water stands on the 
roof. [NFPA 54:9.4.2.4] 

509.3 Access to Appliances on Roofs. I 

509.3.1 Gas utilization appliances located on I 
roofs or other elevated locations shall be acces- 
sible. [NFPA 54:9.4.3.1] 

509.3.2 Buildings exceeding fifteen (15) feet (4.6 
m) in height shall have an inside means of access 
to the roof, unless other means acceptable to the 



49 



509.3-510.2 



UNIFORM PLUMBING CODE 



Authority Having Jurisdiction are used. [NFPA 
54:9.4.3.2] 

509.3.3 The inside means of access shall be a 
permanent or fold-away inside stairway or 
ladder, terminating in an enclosure, scuttle, or 
trap door. Such scuttles or trap doors shall be 
not less than twenty-two (22) inches x twenty- 
four (24) inches (560 mm x 610 mm) in size, shall 
open easily and safely under all conditions, 
especially snow; and shall be constructed so as 
to permit access from the roof side unless delib- 
erately locked on the inside. 

Not less than six (6) feet (1.8 m) of clearance 
shall be available between the access opening and 
the edge of the roof or similar hazard, or rigidly 
fixed rails or guards not less than forty-two (42) 
inches (1.1 m) in height shall be provided on the 
exposed side. Where parapets or other building 
structures are utilized in lieu of guards or rails, 
they shall be not less than forty- two (42) inches 
(1.1 m) in height. [NFPA 54:9.4.3.3] 

509.3.4 Permanent lighting shall be provided at 
the roof access. The switch for such lighting shall 
be located inside the building near the access 
means leading to the roof. [NFPA 54:9.4.3.4] 

509.4 Appliances in Attics. 

509.4.1 Attic Access. An attic in which an 
appliance is installed shall be accessible through 
an opening and passageway not less than as 
large as the largest component of the appliance, 
and not less than twenty-two (22) inches x thirty 
(30) inches (560 mm x 760 mm). [NFPA 54:9.5.1] 

509.4.2 Where the height of the passageway is 
less than six (6) feet (1.8 m), the distance from 
the passageway access to the appliance shall not 
exceed twenty (20) feet (6.1 m) measured along 
the centerline of the passageway. [NFPA 
54:9.5.1.1] 

509.4.3 The passageway shall be unobstructed 
and shall have solid flooring not less than twenty- 
four (24) inches (610 mm) wide from the entrance 
opening to the appliance. [NFPA 54:9.5.1.2] 

509.4.4 Work Platform. A level working plat- 
form not less than thirty (30) inches (760 mm) by 
thirty (30) inches (760 mm) shall be provided in 
front of the service side of the appliance. [NFPA 
54:9.5.2] 

509.4.5 Lighting and Convenience Outlet. A 

permanent 120-volt receptacle outlet and a 
lighting fixture shall be installed near the appli- 
ance. The switch controlling the lighting fixture 
shall be located at the entrance to the 
passageway. [NFPA 54:9.5.3] 



510.0 Venting of Appliances. | 

510.1 General'. This section recognizes that the 
choice of venting materials and the methods of 
installation of venting systems are dependent on the 
operating characteristics of the appliance. [NFPA 1 
54:12,2.1] l 

510.1.1 Categories. The operating characteris- 
tics of vented gas utilization appliances can be 
categorized with respect to (1) positive or nega- 
tive pressure within the venting system, and (2) 
whether or not the appliance generates flue or 
vent gases that can condense in the venting 
system. See NFPA 54, Section 3.3 for the defini- 
tion of these vented appliance categories. [NFPA I 
54:12.2.2] 

510.1.2 Installation. Listed vents shall be 
installed in accordance with Chapter 5 and the 
manufacturer's installation instructions. [NFPA 

54:12.2.3] 

510.1.3 Appliance vents shall not discharge into 
any space enclosed by screens having openings 
less than one-fourth (1/4) inch (6.4 mm.) mesh. 

510.2 Specification for Venting. 

510.2.1 Connection to Venting Systems. 

Except as permitted in Sections 510.2.2 through 
510.2.6, gas utilization appliances shall be | 
connected to venting systems. [NFPA 54:12.3.1] 

510.2.2 Appliances Not Required to Be I 
Vented. The following appliances shall not be | 
required to be vented [NFPA 54:12.3.2]: 

510.2.2.1 Listed ranges. [NFPA 54:12.3.2(1)] 

510.2.2.2 Built-in domestic cooking units 
listed and marked for optional venting. 
[NFPA 54:12.3.2(2)] 

510.2.2.3 Listed hot plates and listed 
laundry stoves. [NFPA 54:12.3.2(3)] 

510.2.2.4 Listed Type 1 clothes dryers shall 
be exhausted to the outside air. [NFPA 
54:12.3.2(4)] 

510.2.2.5 A single listed booster-type (auto- 
matic instantaneous) water heater, when 
designed and used solely for the sanitizing 
rinse requirements of a dish-washing 
machine, provided that the appliance is 
installed with the draft hood in place and 
unaltered if a draft hood is required, in a 
commercial kitchen having a mechanical 
exhaust system; where installed in this 
manner, the draft hood outlet shall be not 
less than thirty-six (36) inches (910 mm) 
vertically and six (6) inches (150 mm) hori- 
zontally from any surface other than the 
appliance. [NFPA 54:12.3.2(5)] | 



50 



WATER HEATERS 



510.2-510.3 



510.2.2.6 Listed refrigerators. [NFPA 
54:12.3.2(6)] 

510.2.2.7 Counter appliances. [NFPA 
54:12.3.2(7)] 

510.2.2.8 Direct gas-fired makeup air 
heaters. [NFPA 54:12.3.2(9)] 

510.2.2.9 Other appliances listed for 
unvented use and not provided with flue 
collars. [NFPA 54:12.3.2(10)] 

510.2.2.10 Specialized appliance of limited 
input such as laboratory burners or gas 
lights. [NFPA 54:12.3.2(11)] 

Where appliances in Sections 510.2.2.5 
through 510.2.2.10 are installed so the aggre- 
gate input rating exceeds 20 Btu/h/ft. 3 (207 
W/m 3 ) of room or space in which it is 
installed, one (1) or more shall be provided 
with venting systems or other approved 
means for removing the vent gases to the 
outside atmosphere so the aggregate input 
rating of the remaining unvented appliance 
does not exceed 20 Btu/h/ft. 3 (207 W/m 3 ). 
Where the calculation includes the volume 
of an adjacent room or space, the room or 
space in which the appliance is installed 
shall be directly connected to the adjacent 
room or space by a doorway, archway, or 
other opening of comparable size that 
cannot be closed. [NFPA 54:12.3.2] 

510.2.3 Ventilating Hoods. Ventilating hoods 
and exhaust systems shall be permitted to be 
used to vent gas utilization appliances installed 
in commercial applications (see Section 510.3.5) 
and to vent industrial appliances, particularly 
where the process itself requires fume disposal. 
[NFPA 54:12.3.3] 

510.2.4 Well-Ventilated Spaces. The operation 
of industrial appliances such that its flue gases are 
discharged directly into a large and well-venti- 
lated space shall be permitted. [NFPA 54:12.3.4] 

510.2.5 Direct- Vent Appliances. Listed direct- 
vent gas utilization appliances shall be consid- 
ered properly vented where installed in accor- 
dance with the terms of its listing, the manufac- 
turer's instructions, and Section 510.8.3 of this 
code. [NFPA 54:12.3.5] 

510.2.6 Appliances with Integral Vents. Gas 

utilization appliances incorporating integral 
venting means shall be considered properly 
vented where installed in accordance with its 
listing, the manufacturer's instructions, and 
Sections 510.8.1 and 510.8.2 of this code. [NFPA 
54:12.3.6] 



510.3 Design and Construction. 

510.3.1 Minimum Safe Performance. A venting 
system shall be designed and constructed so as 
to develop a positive flow adequate to remove 
flue or vent gases to the outside atmosphere. 
[NFPA 54:12.1] 

510.3.2 Appliance Draft Requirements. A | 

venting system shall satisfy the draft require- 
ments of the appliance in accordance with the | 
manufacturer's instructions. [NFPA 54:12.4.1] 

510.3.3 Design and Construction. Gas utiliza- 
tion appliances required to be vented shall be I 
connected to a venting system designed and 
installed in accordance with the provisions of 
Sections 510.4 through 510.15 of this code. 
[NFPA 54:12.4.2] 

510.3.4 Mechanical Draft Systems. 

510.3.4.1 Mechanical draft systems shall be 
listed and shall be installed in accordance 
with the terms of their listing and both the 
appliance and the mechanical draft system 
manufacturer's instructions. [NFPA 
54:12.4.3.1] 

510.3.4.2 Gas utilization appliances | 
requiring venting shall be permitted to be 
vented by means of mechanical draft 
systems of either forced or induced draft 
design. [NFPA 54:12.4.3.2] 

Exception: Incinerators. 

51 0.3.4.3 Forced draft systems and portions of 
induced draft sys'tems under positive pressure 
during operation shall be designed and 
installed so as to prevent leakage of flue or 
vent gases into a building. [NFPA 54:12.4.3.3] 

510.3.4.4 Vent connectors serving appli- | 
ances vented by natural draft shall not be 
connected into any portion of mechanical 
draft systems operating under positive pres- 
sure. [NFPA 54:12.4.3.4] 

510.3.4.5 Where a mechanical draft system 
is employed, provision shall be made to 
prevent the flow of gas to the main burners 
when the draft system is not performing so 
as to satisfy the operating requirements of 
the appliance for safe performance. [NFPA | 
54:12.4.3.5] 

510.3.4.6 The exit terminals of mechanical 
draft systems shall be not less than seven (7) 
feet (2.1 m) above finished grade where j 
located adjacent to public walkways and 
shall be located as specified in Sections 
510.8.1 and 510.8.2 of this code. [NFPA 
54:12.4.3.6] 



51 



510.3-510.5 



UNIFORM PLUMBING CODE 



510.3.5 Ventilating Hoods and Exhaust 
Systems. 

510.3.5.1 Ventilating hoods and exhaust 
systems shall be permitted to be used to 

| vent gas utilization appliances installed in 

commercial applications. [NFPA 54:12.4.4.1] 

510.3.5.2 Where automatically operated 
I appliances, other than commercial cooking 
I appliances, are vented through a ventilating 

hood or exhaust system equipped with a 
damper or with a power means of exhaust, 
provisions shall be made to allow the flow 
of gas to the main burners only when the 
damper is open to a position to properly 
| vent the appliance and when the power 

means of exhaust is in operation. [NFPA 
54:12.4.4.2] 

510.3.6 Circulating Air Ducts and Furnace 

I Plenums. Venting systems shall not extend into 
or pass through any fabricated air duct or 
furnace plenum. [NFPA 54-09:12.4.5.1] 

510.4 Type of Venting System to Be Used. 

510.4.1 The type of venting system to be used 
shall be in accordance with Table 5-2. [NFPA 
54:12.5.1] 

510.4.2 Plastic Piping. Plastic piping used for 
I venting appliances listed for use with such 

venting materials shall be approved. [NFPA 
54:12.5.2] 

510.4.3 Plastic Vent Joints. Plastic pipe and 
fittings used to vent appliances shall be installed 
in accordance with the appliance manufacturer's 
installation instructions. Where primer is 
required, it shall be of a contrasting color. 
[NFPA 54-09:12.5.3] 

510.4.4 Special Gas Vent. Special gas vent shall 
be listed and installed in accordance with the 
terms of the special gas vent listing and the 
manufacturer's instructions. [NFPA 54:12.5.3] 

510.5 Masonry, Metal, and Factory-Built Chimneys. 
510.5.1 Listing or Construction. 

510.5.1.1 Factory-built chimneys shall be 
installed in accordance with their listing and 
the manufacturer's instructions. Factory- 
built chimneys used to vent appliances that 
operate at positive vent pressure shall be 
listed for such application. [NFPA 
54:12.6.1.1] 

510.5.1.2 Metal chimneys shall be built and 
installed in accordance with NFPA 211, 
Standard for Chimneys, Fireplaces, Vents, and 
Solid Fuel-Burning Appliances. [NFPA 
54:12.6.1.2] 

510.5.1.3 Masonry chimneys shall be built 
and installed in accordance with NFPA 211, 



Standard for Chimneys, Fireplaces, Vents, and 
Solid Fuel-Burning Appliances, and lined with 
approved clay flue lining, a listed chimney 
lining system, or other approved material 
that will resist corrosion, erosion, softening, 
or cracking from vent gases at temperatures 
up to 1,800°F (982°C). [NFPA 54:12.6.1.3] 

Exception: Masonry chimney flues lined 
with a chimney lining system specifi- 
cally listed for use with listed gas appli- 
ances with draft hoods, Category I 
appliances, and other gas appliances 
listed for use with Type B vents shall be 
permitted. The liner shall be installed in 
accordance with the liner manufactur- 
er's instructions and the terms of the 
listing. A permanent identifying label 
shall be attached at the point where the 
connection is to be made to the liner. 
The label shall read: "This chimney liner 
is for appliances that burn gas only. Do 
not connect to solid- or liquid-fuel- 
burning appliances or incinerators." 
[NFPA 54:12.6.13] 

510.5.2 Termination. 

510.5.2.1 A chimney for a residential-type 
or low-heat gas utilization appliance shall | 
extend at least three (3) feet (0.9 m) above 
the highest point where it passes through 
the roof of a building and at least two (2) 
feet (0.6 m.) exceeding any portion of a 
building within a horizontal distance of ten 
(10) feet (3.0 m). [See Figure 5-1.] [NFPA 
54:12.6.2.1] 

510.5.2.2 A chimney for a medium-heat 
appliance shall extend at least ten (10) feet | 
(3.0 m) exceeding any portion of any 
building within twenty-five (25) feet (7.6 m). 
[NFPA 54:12.6.2.2] 

510.5.2.3 A chimney shall extend at least 
five (5) feet (1.5 m) above the highest 
connected appliance draft hood outlet or | 
flue collar. [NFPA 54:12.6.2.3] . 

510.5.2.4 Decorative shrouds shall not be 
installed at the termination of factory-built 
chimneys except where such shrouds are 
listed and labeled for use with the specific 
factory-built chimney system and are 
installed in accordance with manufacturer's 
installation instructions. [NFPA 54:12.6.2.4] 

510.5.3 Size of Chimneys. The effective area of 
a chimney venting system serving listed gas 
appliances with draft hoods, Category I appli- 
ances, and other appliances listed for use with 



52 



WATER HEATERS 



Figure 5-1 -510.5 



2 ft (0.6 m) 
minimum - 



/ or less 



ZL 



Chimney 



i. 



t 



2 ft (0.6 m) minimum 



Wall or 
parapet 



Jj^ 



t 
3 ft (0.9 m) 
minimum 

4 



Chimney 



10 ft (3.0 m) 
or less 



3 ft (0,9 m) 
minimum 




(a) Termination 10 ft (3,0 m) or Less from Ridge, Wail, or Parapet 



More than 
-10 ft (3.0 m)- 



Wall or 
parapet 



-*VL 



'iS:V;::pv-;-:;*?-v- 



Note: No height 
above parapet 
required when 
distance from wails 
or parapet is more 
than 10 ft (3.0 m). 



3 ft (0.9 m) 
minimum 



Chimney 



Ridge 



More than 
10 ft (3.0 m) — * 

-10 ft (3.0 m)-* 




Height above any 
roof surface within 
10 ft (3.0 m) horizontally 



Chimney 



(b) Termination More Than 10 ft (3.0 m) from Ridge, Wall, or Parapet 

FIGURE 5-1 Typical Termination Locations for 
Chimneys and Single-Wall Metal Pipes Serving 
| Residential-Type and Low-Heat Appliance 
[NFPA 54: Figure 12.6.2.1] 



Type B vents shall be in accordance with one of 
the following methods [NFPA 54:12.6.3.1]: 

(1) This chapter and NFPA 54: Chapter 13. 
[NFPA 54:12.6.3.1(1)] 

(2) For sizing an individual chimney venting 
system for a single appliance with a draft 
hood, the effective areas of the vent 
connector and chimney flue shall be not less 
than the area of the appliance flue collar or 
draft hood outlet or exceeding seven (7) 
times the draft hood outlet area. [NFPA 
54:12.6.3.1(2)] 

(3) For sizing a chimney venting system 
connected to two (2) appliances with draft 
hoods, the effective area of the chimney flue 
shall be not less than the area of the larger 
draft hood outlet plus 50 percent of the area 
of the smaller draft hood outlet, or 
exceeding seven (7) times the smallest draft 
hood outlet area. [NFPA 54:12.6.3.1(3)] 

(4) Other approved engineering methods. 
[NFPA 54:12.6.3.1(5)] 

(5) Chimney venting systems using mechanical 
draft shall be sized in accordance with 
approved engineering methods. [NFPA 
54:12.6.3.1(4)] 

510.5.4 Inspection of Chimneys. 

(A) Before replacing an existing appliance or 
connecting a vent connector to a chimney, the 
chimney passageway shall be examined to 
ascertain that it is clear and free of obstruc- 
tions and shall be cleaned if previously used 
for venting solid- or liquid-fuel-burning 
appliances or fireplaces. [NFPA 54:12.6.4.1] 

(B) Chimneys shall be lined in accordance with 
NFPA 211, Standard for Chimneys, Fireplaces, 
Vents, and Solid-Fuel Burning Appliances. 
[NFPA 54-09:12.6.4.2] 

Exception: Existing chimneys shall be 
permitted to have their use continued 
where an appliance is replaced by an 
appliance of similar type, input rating, 
and efficiency, where the chimney 
complies with 510.5.4, and the sizing of 
the chimney is in accordance with 
510.5.3. 

(C) Cleanouts shall be examined to determine 
that they will remain tightly closed when 
not in use. [NFPA 54:12.6.4.3] 

(D) When inspection reveals that an existing 
chimney is not safe for the intended applica- 
tion, it shall be repaired, rebuilt, lined, 
relined, or replaced with a vent or chimney 



53 



Figure 5-2 -51 0.5 



UNIFORM PLUMBING CODE 



Listed Lowe st discharge opening^ 
cap ""*t,. ,, I — L 

Listed gas 
vent 




Roof pitch is xi}2 



H {minimum) - 
Minimum height from roof 
to lowest discharge opening 



Roof pitch heights 



Roof pitch H(minimum) ft. 


m 


Flat to 6/12 


1.0 


0.30 


Over 6/12 to 7/12 


1.25 


0.38 


Over 7/12 to 8/12 


1.5 


0.46 


Over 8/12 to 9/12 


2.0 


0.61 


Over 9/12 to 10/12 


2.5 


0.76 


Over 10/12 to 11/12 


3.25 


0.99 


Over 11/12 to 12/12 


4.0 


1.22 


Over 12/12 to 14/12 


5.0 


1.52 


Over 14/12 to 16/12 


6.0 


1.83 


Over 16/12 to 18/12 


7.0 


2.13 


Over 18/12 to 20/12 


7.5 


2.27 


Over 20/ 12 to 21/ 12 


8.0 


2.44 



FIGURE 5-2 Gas Vent Termination Locations for 
Listed Caps 12 in. (300 mm) or Less in Size not 
less than 8 ft. (2.4 m) from a Vertical Wall [NFPA 
54: Figure 12.7.2 and Table 12.7.2] 



TW 



Gas furnace 




Type B gas vents 



Air grilles in 
outside walls 



Louvered door could 
be used in lieu of 
outside wail grilles 



FIGURE 5-3 Plan View of Practical Separation 
Method for Multistory Gas Venting. [NFPA 54: 
Figure 12.7.4.2] 



to conform to NFPA 211, Standard for Chim- 
neys, Fireplaces, Vents, and Solid-Fuel-Burning 
Appliances, and shall be suitable for the 
appliances to be attached. [NFPA I 
54:12.6.4.4] 

510.5.5 Chimney Serving Appliances Burning | 
Other Fuels. 

510.5.5.1 Gas utilization appliances shall not | 
be connected to a chimney flue serving a 
separate appliance designed to burn solid 
fuel. [NFPA 54:12.6.5.1] 

510.5.5.2 Where one (1) chimney serves gas 
utilization appliances and liquid fuel- | 
burning appliances, the appliance shall be | 
connected through separate openings or 
shall be connected through a single opening 
where joined by a suitable fitting located as 
close as practical to the chimney. Where two 
(2) or more openings are provided into one 
(1) chimney flue, they shall be at different 
levels. Where the gas utilization appliance is | 
automatically controlled, it shall be 
equipped with a safety shutoff device. 
[NFPA 54:12.6.5.2] 

510.5.5.3 A listed combination gas- and 
solid-fuel-burning appliance connected to a 
single chimney flue shall be equipped with 
a manual reset device to shut off gas to the 
main burner in the event of sustained back- 
draft or flue gas spillage. The chimney flue 
shall be sized to properly vent the appli- 
ance. [NFPA 54:12.6.5.3] 

510.5.5.4 A single chimney flue serving a 
listed combination gas- and oil-burning 
appliance shall be sized to properly vent the 
appliance. [NFPA 54:12.6.5.4] 

510.5.6 Support of Chimneys. Portions of 
chimneys shall be supported for the design and 
weight of the materials employed. Listed 
factory-built chimneys shall be supported and 
spaced in accordance with their listings and the 
manufacturer's instructions. [NFPA 54:12.6.6] 

510.5.7 Cleanouts. Where a chimney that 
formerly carried flue products from liquid- or 
solid-fuel-burning appliances is used with an 
appliance using fuel gas, an accessible cleanout 
shall be provided. The cleanout shall have a 
tight-fitting cover and be installed so its upper 
edge is at least six (6) inches (150 mm) below the 
lower edge of the lowest chimney inlet opening. 
[NFPA 54:12.6.7] 

510.5.8 Space Surrounding Lining or Vent. 
510.5.8.1 The remaining space surrounding 
a chimney liner, gas vent, special gas vent, 



54 



WATER HEATERS 



Table 5-2 -510.6 



TABLE 5-2 

Type of Venting System to Be Used 

[NFPA 54: Table 12.5.1] 

| Gas Utilization Appliances Type of Venting System 



Listed Category I 
| appliances 



Type B gas vent (510.6) 



| Listed appliances 
equipped with 
draft hood 

| Appliances listed for 
Type B gas vent 



Chimney (510.5) 

Single-wall metal pipe 

(510.7) 

Listed chimney lining 

system for gas venting 

(510.5.1.3) 

Special gas vent listed for 

this appliance (510.4.4) 



Listed vented wall 
furnaces 



Type B-W gas vent (510.6, 
510.6.2.2) 



1 Category II appliances 
I Category III appliances 
I Category IV appliances 



As specified or furnished 

By manufacturers of listed 
appliance (510.4.2, 510.4.4) 



Incinerators, outdoors 



Single-wall metal pipe 
(510.7, 510.7.3) 



Incinerators, indoors 

| Appliances that can be 
converted to use of 
solid fuel 

Unlisted combination 
gas- and oil-burning 
| appliances 

Combination gas- and 
solid-fuel-burning 
| appliances 

| Appliances listed for use 
with chimneys only 

| Unlisted appliances 



Chimney (510.5) 



Listed combination 
gas- and oil-burning 
| appliances 



Type L vent (510.6) or 
chimney (510.5) 



Decorative appliance in 
vented fireplace 



Chimney [UMC 907.2(3)] 



Gas-fired toilets 



Single-wall metal pipe 
(510.7, NFPA 54:10.25.3) 



1 Direct-vent appliances See 510.2.5 



I Appliances with 
integral vent 



See 510.2.6 



or plastic piping installed within a masonry 
chimney flue shall not be used to vent 
another appliance. [NFPA 54:12.6.8.1] 

Exception: The insertion of another 
liner or vent within the chimney as 
provided in this code and the liner or 
vent manufacturer's instructions. 

510.5.8.2 The remaining space surrounding 
a chimney liner, gas vent, special gas vent, 
or plastic piping installed within a masonry 
chimney flue shall not be used to supply 
combustion air. [NFPA 54:12.6.8.2] 

Exception: Direct-vent gas-fired appli- 
ances designed for installation in a 
solid-fuel-burning fireplace where 
installed in accordance with the listing 
and the manufacturer's instruction. 

510.6 Gas Vents. 

510.6.1 A gas vent passing through a roof shall 
extend through the entire roof flashing, roof 
jack, or roof thimble and be terminated with a 
listed termination cap. [NFPA 54:12.7.2(6)] 

510.6.1.1 Type B or Type L vents shall 
extend in a generally vertical direction with 
offsets not exceeding 45 degrees, except that 
a vent system having not more than one 60 
degree offset shall be permitted. Any angle 
greater than 45 degrees from the vertical is 
considered horizontal. The total horizontal 
distance of a vent plus the horizontal vent 
connector serving draft-hood-equipped 
appliances shall not exceed 75 percent of the 
vertical height of the vent. [NFPA 
54:12.7.3.2] 

Exception: Systems designed and sized 
as provided in this chapter or in accor- 
dance with other approved engineering 
methods. 

510.6.1.2 Screws, rivets and other fasteners I 
shall not penetrate the inner wall of double I 
wall gas vents. 

510.6.2 A gas vent shall terminate in accordance 
with one of the following [NFPA 54:12.7.2(1)]: 

(1) Above the roof surface with a listed cap or 
listed roof assembly. Gas vents twelve (12) 
inches (300 mm) in size or smaller with listed 
caps shall be permitted to be terminated in 
accordance with Figure 5-2, provided they 
are at least eight (8) feet (2.4 m) from a 
vertical wall or similar obstruction. Other 
gas vents shall terminate not less than two 
(2) feet (0.6 m) above the highest point where 
they pass through the roof and at least two 
(2) feet (0.6 m) exceeding any portion of a 
building within ten (10) feet (3.1 m). [NFPA 
54:12.7.2(l)(a) and (b)] 



55 



51 0.6 -Table 5-3 



UNIFORM PLUMBING CODE 



(2) Industrial gas utilization appliances as 
provided in Section 510.2.4. [NFPA 
54:12.7.2(l)(c)] 

(3) Direct-vent systems as provided in Section 
510.2.5. [NFPA 54:12.7.2(1 )(d)] 

(4) Appliances with integral vents as provided 
in Section 510.2.6. [NFPA 54:12.7.2(l)(e)] 

(5) Mechanical draft systems as provided in 
Section 510.3.4. [NFPA 54:12.7.2(1 )(f)] 

(6) Ventilating hoods and exhaust systems as 
provided in Section 510.3.5. [NFPA 54: 
12.7.2(l)(g)] 

510.6.2.1 A Type Bora Type L gas vent 
shall terminate at least five (5) feet (1.5 m) in 
vertical height above the highest connected 
appliance draft hood or flue collar. [NFPA 
54:12.7.2(2)] 

510.6.2.2 A Type B-W gas vent shall termi- 
nate at least twelve (12) feet (3.7 m) in 
vertical height above the bottom of the wall 
furnace. [NFPA 54:12.7.2(3)] 



510.6.2.3 A gas vent extending through an 
exterior wall shall not terminate adjacent to 
the wall or below eaves or parapets, except 
as provided in Sections 510.2.5 and 510.3.4. 
[NFPA 54:12.7.2(4)] 

510.6.2.4 Decorative shrouds shall not be 
installed at the termination of gas vents 
except where such shrouds are listed for use 
with the specific gas venting system and are 
installed in accordance with manufacturer's 
installation instructions. [NFPA 54:12.7.2(5)] 

510.6.2.5 Gas vents shall extend through 
the roof flashing, roof jack, or roof thimble 
and terminate with a listed cap or listed roof 
assembly. [NFPA 54:12.7.2(6)] 

510.6.2.6 A gas vent shall terminate at least 
three (3) feet (0.9 m.) above a forced air inlet 
located within ten (10) feet (3.0 m). [NFPA 
54:12.7.2(7)] 

510.6.3 Size of Gas Vents. Venting systems 
shall be sized and constructed in accordance 



TABLE 5-3 
Clearance for Connectors [NFPA 54; Table 12.8.4.4] 



Minimum Distance from Combustible Material 



I Appliance 



Listed Type B 
Gas Vent Material 



Listed Type L 
Vent Material 



Single-Wall 
Metal Pipe 



Factory-Built 
Chimney Sections 



| Listed appliances with 
draft hoods and appliances 
listed for use with 
Type B gas vents 



As listed 



As listed 



As listed 



Residential boilers and 
furnaces with listed gas 
conversion burner and 
with draft hood 



6 in. 



6 in. 



9 in. 



As listed 



| Residential appliances 
listed for use with Type L 
vents 


Not permitted 


As listed 


9 in. 


As listed 


Listed gas-fired toilets 


Not permitted 


As listed 


As listed 


As listed 


Unlisted residential 
| appliances with draft 
hood 


Not permitted 


6 in. 


9 in. 


As listed 


Residential and low-heat 
| appliances other 
than those above 


Not permitted 


9 in. 


18 in. 


As listed 


Medium-heat 
| appliances 


Not permitted 


Not permitted 


36 in. 


As listed 



For SI units, 1 in.= 25.4 mm. 

Note: These clearances shall apply unless the listing of an appliance or connector specifies clearances, in which case the listed clearances 

shall apply. 



56 



WATER HEATERS 



510.6 



with NFPA 54, Chapter 13 or other approved 
engineering methods and the gas vent and gas 
appliance manufacturer's instructions. [NFPA 
54:12.7.3] 

510.6.3.1 Category I Appliances. The 

sizing of natural draft venting systems 
serving one (1) or more listed appliances 
equipped with a draft hood or appliances 
listed for use with Type B gas vent, installed 
in a single story of a building, shall be in 
accordance with one of the following 
methods [NFPA 54:12.7.3.1]: 

(1) The provisions of this chapter. [NFPA 
54:12.7.3.1(1)] 

(2) Vents serving fan-assisted combustion 
system appliances, or combinations of 
fan-assisted combustion systems and 
draft hood-equipped appliances, shall 
be sized in accordance with this chapter 
or other approved engineering 
methods. [NFPA 54:12.7.3.1(2)] 

(3) For sizing an individual gas vent for a 
single, draft-hood-equipped appliance, 
the effective area of the vent connector 
and the gas vent shall be at least the 
area of the appliance draft hood outlet 
or exceeding seven (7) times the draft 
hood outlet area. [NFPA 54:12.7.3.1(3)] 

(4) For sizing a gas vent connected to two 
(2) appliances with draft hoods, the 
effective area of the vent shall be at least 
the area of the larger draft hood outlet 
plus 50 percent of the area of the smaller 
draft hood outlet or exceeding seven (7) 
times the smaller draft hood outlet area. 
[NFPA 54:12.7.3.1(4)] 

(5) Approved engineering practices. [NFPA 
54:12.7.3.1(5)] 

510.6.3.2 Category II, Category III, and 
Category IV Appliances. The sizing of gas 
vents for Category II, Category III, and Cate- 
gory IV gas utilization appliances shall be in 
accordance with the equipment manufactur- 
er's instructions. [NFPA 54:12.7.3.3] 

510.6.3.3 Sizing. Chimney venting systems 
using mechanical draft shall be sized in 
accordance with approved engineering 
methods. [NFPA 54:12.7.3.4] 

510.6.4 Gas Vents Serving Appliances on 
More Than One Floor. 

510.6.4.1 A common gas vent shall be 
permitted in multistory installations to vent 



Category I gas utilization appliances located I 
on more than one (1) floor level, provided 
the venting system is designed and installed 
in accordance with approved engineering 
methods. 

For the purpose of this section, crawl 
spaces, basements, and attics shall be 
considered as floor levels. [NFPA 54:12.7.4.1] 

510.6,4.2 Gas utilization appliances | 
connected to the common vent shall be 
located in rooms separated from a habitable 
space. Each of these rooms shall have provi- 
sions for an adequate supply of combustion, 
ventilation, and dilution air that is not 
supplied from a habitable space. (See Figure 
5-3.) [NFPA 54:12.7.4.2] 

The size of the connectors and common 
segments of multistory venting systems for 
gas utilization appliances listed for use with I 
Type B double-wall gas vent shall be in 
accordance with Table 5-14, provided 
[NFPA 54:12.7.4.3]: 

(1) The available total height (H) for each 
segment of a multistory venting system 
is the vertical distance between the level 
of the highest draft hood outlet or flue 
collar on that floor and the centerline of 
the next highest interconnection tee. 
(See Figure G.l(K).) [NFPA 54:12.7.4.3(1)] 

(2) The size of the connector for a segment 
is determined from its gas utilization 
appliance heat input and available 
connector rise, and shall not be smaller 
than the draft hood outlet or flue collar 
size. [NFPA 54:12.7.4.3(2)] 

(3) The size of the common vertical vent 
segment, and of the interconnection tee 
at the base of that segment, shall be 
based on the total gas utilization appli- | 
ance heat input entering that segment 
and its available total height. [NFPA 
54:12.7.4.3(3)] 

510.6.5 Support of Gas Vents. Gas vents shall 
be supported and spaced in accordance with 
their listings and the manufacturer's instruc- 
tions. [NFPA 54:12.7.5] 

510.6.6 Marking. In those localities where solid 
and liquid fuels are used extensively, gas vents 
shall be permanently identified by a label 
attached to the wall or ceiling at a point where 
the vent connector enters the gas vent. The 
label shall read: "This gas vent is for appliances 
that burn gas. Do not connect to solid- or 
liquid-fuel-burning appliances or incinerators." 



57 



Table 5-4 



UNIFORM PLUMBING CODE 



TABLE 5-4 
Reduction of Clearances with Specified Forms of Protection [NFPA 54: Table 10.2.3(b)] 

Where the required clearance with no protection from appliance, vent connector, or single- 
wall metal pipe is: 



36 in. 



18 in. 



12 in. 



9 in. 



6 in. 



Allowable Clearances with Specified Protection (in.) 



Type of protection applied 
to and covering surfaces of 
combustible material within 
the distance specified as 
the required clearance with 
no protection [See Figures 
5-4 through 5-6.] 



Use Col. 1 for clearances above appliance or horizontal connector. Use Col. 2 for clearances from 
appliances, vertical connector, and single-wall metal pipe. 

Sides Sides Sides Sides Sides 

and and and and and 

Above Rear Above Rear Above Rear Above Rear Above Rear 

Col. 1 Col. 2 Col. 1 Col. 2 Col. 1 Col. 2 Col. 1 Col. 2 Col. 1 Col. 2 



(1) 3-1/2 in. thick masonry 
wall without ventilated 
air space 

(2) 1/2 in. insulation board 
over 1 in. glass fiber or 
mineral wool batts 

(3) 0.024 sheet metal over. 1 
in. glass fiber or mineral 
wool batts reinforced 
with wire on rear face 
with ventilated air space 

(4) 3-1/2 in. thick masonry 
wall with ventilated air 
space 

(5) 0.024 sheet metal with 
ventilated air space 

(6) 1/2 in. thick insulation 
board with ventilated 
air space 

(7) 0.024 sheet metal with 
ventilated air space over 
0.024 sheet metal with 
ventilated air space 

(8) 1 in. glass fiber or 
mineral wool batts sand- 
wiched between two 
sheets 0.024 sheet metal 
with ventilated air space 



24 



18 



24 



18 



12 



12 



12 



12 

18 12 

18 12 

18 12 

18 12 



96645332 
966453 3 3 



For SI units, 1 in. = 25.4 mm. 
Notes: 

J Reduction of clearances from combustible materials shall not interfere with combustion air, draft hood clearance and relief, and acces- 
sibility of servicing. 

2 Clearances shall be measured from the outer surface of the combustible material to the nearest point on the surface of the appliance, 
disregarding any intervening protection applied to the combustible material. 

3 Spacers and ties shall be of noncombustible material. No spacer or tie shall be used directly opposite the appliance or connector. 

4 Where clearance reduction systems use a ventilated air space, adequate provision for air circulation shall be provided as described. 
[See Figure 5-5 and Figure 5-6.] 

5 There shall be at least one (1) in. (25 mm) between clearance reduction systems and combustible walls and ceilings for reduction 
systems using a ventilated air space. 

6 Where a wall protector is mounted on a single flat wall away from corners, it shall have a minimum one (1) inch (25 mm) air gap. To 
provide adequate air circulation, the bottom and top edges, or only the side and top edges, or edges shall be left open. 

7 Mineral wool batts (blanket or board) shall have a minimum density of eight (8) lb /ft. 3 (128 kg/m 3 ) and a minimum melting point of 
1,500°F (816°C). 

8 Insulation material used as part of a clearance reduction system shall have a thermal conductivity of 1.0 Btu in. /ft /h-°F (0.144 W/m- 
K) or less. 

9 There shall be at least (1) inch (25 mm) between the appliance and the protector. In no case shall the clearance between the appliance 
and the combustible surface be reduced below that allowed in this table. 
Clearances and thicknesses are minimum; larger clearances and thicknesses are acceptable. 



Listed single-wall connectors shall be installed in accordance with the terms of their listing and the manufacturer's instructions. 



58 



WATER HEATERS 



Figure 5-4 -51 0.7 



Construction using combustible — •, 
material, plastered or unpiastered 



K 



S 



E 





Sheet metal or 
other protection 

<— Gas equipment - 
or vent connector 



Notes: 

A - Equals the clearance with no protection specified in Tables 
5-3 and 5-4 and in the sections applying to various types of 
| appliances. 

B - Equals the reduced clearance permitted in accordance with 
Table 5-3. The protection applied to the construction using 
combustible material shall extend far enough in each direction 
to make C equal to A. 

FIGURE 5-4 Extent of Protection Necessary to 
| Reduce Clearances from Gas Appliances or Vent 
Connectors. [NFPA 54:Figure 10.3.2.2(1)] 



1 in, (25.4 mm)/ "" 
minimum atf space 
between masonry 
and combustible wait 



Combustible wall 
/ 




4 in. (102 mm) — 
nominal brick wait 



Bottom and top course 
of bricks staggered for 
ventilation 



A strip of heavy-gauge steel 
used for added support 

Note: Do not place masonry wall ties directly 
behind appliance or connector. 




Masonry wall tie 



FIGURE 5-6 Masonry Clearance Reduction System. 
[NFPA 54:Figure 10.3.2.2(3)] 




Mounted with side 
and top edges open 



Mounted with top 
and bottom edges 
open 



Wall protector mounted 
on single flat wall 



Must be mounted with top 
and bottom edges open 



Wall protector installed in corner 



Combustible 
-■'/' wall \ ; \ 

./VV i / / : 

J /r,)\\) 
If/I 



/ 



■*~1 in.' 
(25.4 mm) [/ 
air space 



} mv&BSL 



Nail or screw anchor 



-Clearance 
reduction system 



1 in. (25 mm) noncombusttbie 
spacer such as stacked washers, 
'-'""" small-diameter pipe, tubing, or 
electrical conduit. 

Masonry walls can be attached to combustible walls using wall 
ties. Spacers should not be used directly behind appliance or 
connector. 

FIGURE 5-5 Wall Protection Reduction System. 
[NFPA 54:Figure 10.3.2.2(2)] 



TABLE 5-5 

Minimum Thickness for Galvanized Steel Vent 

Connector for Low-Heat Appliances 

[NFPA 54: Table 12.11.2.5] 



Diameter of 
Connector (in.) 



Minimum Thickness 
(m.)* 



Less than 6 

6 to less than 10 

10 to 12 inclusive 

14 to 16 inclusive 

Over 16 



0.019 
0.023 
0.029 
0.034 
0.056 



* For SI units, 1 in. = 25.4 mm; 1 in. 2 = 645 mm 2 . 

The Authority Having Jurisdiction shall deter- 
mine whether its area constitutes such a locality. 
[NFPA 54:12.7.6] 

510.7 Single-Wall Metal Pipe. 

510.7.1 Construction. Single-wall metal pipe | 
shall be constructed of galvanized sheet steel not 
less than 0.0304 inch (07 mm) thick or of other 
approved, noncombustible, corrosion-resistant 
material [NFPA 54:12.8.1] 

510.7.2 Cold Climate. Uninsulated single-wall 
metal pipe shall not be used outdoors in cold I 
climates for venting gas utilization appliances. I 
For venting appliances in regions where the 99 
percent winter design temperature is below 32°F 
(0°C). [NFPA 54:12.8.2] 

510.7.3 Termination. The termination of single- 
wall metal pipe shall comply with the following | 
requirements [NFPA 54:12.8.3]: 



59 



510.7 



UNIFORM PLUMBING CODE 



510.7.3.1 Single-wall metal pipe shall termi- 
nate at least five (5) feet (1.5 m) in vertical 
height above the highest connected appli- 
ance draft hood outlet or flue collar. [NFPA 
54:12.8.3(1)] 

510.7.3.2 Single-wall metal pipe shall extend 
at least two (2) feet (0.6 m) above the highest 
point where it passes through the roof of a 
building and at least (2) feet (0.6 m) 
exceeding any portion of a building within a 
horizontal distance of ten (10) feet (3.1 m). 
[See Figure 5-1.] [NFPA 54:12.8.3(2)] 

510.7.3.3 An approved cap or roof assembly 
shall be attached to the terminus of a single- 
wall metal pipe. [Also see Section 510.7.4.4.] 
[NFPA 54:12.8.3(3)] 

510.7.4 Installation with Appliances 
Permitted by 510.4.1. 

510.7.4.1 Prohibited Use. Single-wall 
metal pipe shall not be used as a vent in 
dwellings and residential occupancies. 
[NFPA 54-09:12.8.4.1] 

510.7.4.2 Single-wall metal pipe shall be 
used only for runs directly from the space in 
which the gas utilization appliance is 
located through the roof or exterior wall to 
the outer air. A pipe passing through a roof 
shall extend without interruption through 
the roof flashing, roof jacket, or roof thimble. 
[NFPA 54:12.8.4.1] 

510.7.4.3 Single-wall metal pipe shall not 
originate in any unoccupied attic or concealed 
space and shall not pass through any attic, 
inside wall, concealed space, or floor. For the 
installation of a single-wall metal pipe 
through an exterior combustible wall, see 
Section 510.7.4.6. [NFPA 54:12.8.4.2] 

510.7.4.4 Single-wall metal pipe used for 
venting an incinerator shall be exposed and 
readily examinable for its full length and 
shall have suitable clearances maintained. 
[NFPA 54:12.8.4.3] 

510.7.4.5 Minimum clearances from single- 
wall metal pipe to combustible material 
shall be in accordance with Table 5-3. 
Reduced clearances from single-wall metal 
pipe to combustible material shall be as 
specified for vent connectors in Table 5-4. 
[NFPA 54:12.8.4.4] 

510.7.4.6 Single-wall metal pipe shall not 
pass through a combustible exterior wall 
unless guarded at the point of passage by a 
ventilated metal thimble not smaller than 
the following [NFPA 54:12.11.14.2]: 



(1) For listed appliances equipped with draft 
hoods and appliances listed for use with 
Type B gas vents, the thimble shall be at a 
minimum four (4) inches (100 mm) larger 
in diameter than the metal pipe. Where 
there is a run of at least six (6) feet (1.8 m) 
of metal pipe in the opening between the 
draft hood outlet and the thimble, the 
thimble shall be a minimum two (2) 
inches (50 mm) larger in diameter than 
the metal pipe. 

(2) For unlisted appliances having draft 
hoods, the thimble shall be a minimum 
six (6) inches (150 mm) larger in diam- 
eter than the metal pipe. 

(3) For residential and low-heat appliances, 
the thimble shall be a minimum twelve 
(12) inches (300 mm) larger in diameter 
than the metal pipe. 

Exception: In lieu of thimble 
protection, combustible material in 
the wall shall be removed a suffi- 
cient distance from the metal pipe 
to provide the specified clearance 
from such metal pipe to combustible 
material. Any material used to close 
up such opening shall be noncom- 
bustible. 

510.7.4.7 Where a single-wall metal pipe 
passes through a roof constructed of 
combustible material, a noncombustible, 
nonventilating thimble shall be used at the 
point of passage. The thimble shall extend 
not less than eighteen (18) inches (460 mm) 
above and six (6) inches (150 mm) below the 
roof with the annular space open at the 
bottom and closed only at the top. The 
thimble shall be sized in accordance with 
Section 510.7.4.6. [NFPA 54:12.8.4.5] 
510.7.5 Size of Single-Wall Metal Pipe. Single- 
wall metal piping shall comply with the 
following requirements [NFPA 54:12.8.5]: 

510.7.5.1 A venting system of a single-wall 
metal pipe shall be sized in accordance with 
one of the following methods and the gas 
appliance manufacturer's instructions | 
[NFPA 54:12.8.5(1)]: 

(1) For a draft-hood-equipped appliance, in 
accordance with this chapter. [NFPA 
54:12.8.5(l)(a)] 

(2) For a venting system for a single appli- 
ance with a draft hood, the areas of the 
connector and the pipe each shall be at 
least the area of the appliance flue collar 
or draft hood outlet, whichever is 
smaller. The vent area shall not exceed 



60 



WATER HEATERS 



510.7-510.10 



seven (7) times the draft hood outlet 
area. [NFPA54:12.8.5(l)(b)] 
(3) Other approved engineering methods. 
[NFPA 54:12.8.5(1 )(c)] 

1 510.7.5.2 Where a single- wall metal pipe is 

used and has a shape other than round, it 
shall have an equivalent effective area equal 
to the effective area of the round pipe for 
which it is substituted, and the internal 
dimension of the pipe shall be at least two 
(2) inches (50 mm). [NFPA 54:12.8.5(2)] 

510.7.5.3 The vent cap or a roof assembly 
shall have a venting capacity at least that of 
the pipe to which it is attached. [NFPA 
54:12.8.5(3)] 

510.7.6 Support of Single-Wall Metal Pipe. 

| Portions of single-wall metal pipe shall be 

supported for the design and weight of the 
material employed. [NFPA 54:12.8.6] 

I 510.7.7 Marking. Single-wall metal pipe shall 

comply with the marking provisions of Section 
510.6.6. [NFPA 54:12.8.7] 

510,8 Through-the-Wall Vent Termination. (See 
Figure 5-12.) 

510.8.1 A mechanical draft venting system shall 
terminate at least three (3) feet (0.9 m) above any 
forced air inlet located within ten (10) feet (3.1 
m). [NFPA 54:12.9.1] 

Exception No. 1: This provision shall not 
apply to the combustion air intake of a 
direct-vent appliance. 

Exception No. 2: This provision shall not 
apply to the separation of the integral 
outdoor air inlet and flue gas discharge of 
listed outdoor appliances. 

510.8.2 A mechanical draft venting system of 
other than direct-vent type shall terminate at 
least four (4) feet (1.2 m) below, four (4) feet (1.2 
m) horizontally from, or one (1) foot (300 mm) 
above any door, operable window, or gravity air 
inlet into any building. The bottom of the vent 
terminal shall be located at least twelve (12) 

1 inches (300 mm) above finished grade. [NFPA 

54:12.9.2] 

510.8.3 The vent terminal of a direct-vent appli- 
ance with an input of 10,000 Btu/h (3 kW) or less 
shall be located at least (6) inches (150 mm) from 
any air opening into a building, and such an 
appliance with an input over 10,000 Btu/h (3 
kW) but not over 50,000 Btu/h (14.7 kW) shall be 
installed with a nine (9) inch (230 mm) vent 
termination clearance, and an appliance with an 
input over 50,000 Btu/h (14.7 kW) shall have at 
least a twelve (12) inch (300 mm) vent termina- 
tion clearance. The bottom of the vent terminal 



and the air intake shall be located at least twelve 
(12) inches (300 mm) above finished grade. 1 
[NFPA 54:12.9.3] 

510.8.4 Through-the-wall vents for Category II 
and Category IV appliances and noncategorized 
condensing appliances shall not terminate over 
public walkways or over an area where conden- 
sate or vapor could create a nuisance or hazard 
or could be detrimental to the operation of regu- 
lators, relief valves, or other equipment. Where 
local experience indicates that condensate is a 
problem with Category I and Category III appli- 
ances, this provision shall also apply. 

Drains for condensate shall be installed in I 
accordance with the manufacturer's installation | 
instructions. [NFPA 54-09:12.9.4] 

510.8.5 Where vents, including those for direct- 
vent appliances or combustion air intake pipes, 
penetrate outside walls of buildings, the annular 
spaces around such penetrations shall be perma- 
nently sealed using approved materials to 
prevent entry of combustion products into the 
building. [NFPA 54-09:12.9.5] 

510.9 Condensation Drain. 

510.9.1 Provision shall be made to collect and 
dispose of condensate from venting systems 
serving Category II and Category IV gas utiliza- 
tion appliances and noncategorized condensing | 
appliances in accordance with Section 510.8.4. 
[NFPA 54:12.10.1] 

510.9.2 Where local experience indicates that 
condensation is a problem, provision shall be 
made to drain off and dispose of condensate 
from venting systems serving Category I and 
Category III gas utilization appliances in accor- I 
dance with 510.8.4. [NFPA 54:12.10.2] 

510.10 Vent Connectors for Category I Gas 
Utilization Appliances. I 

510.10.1 Where Required. A vent connector 
shall be used to connect gas utilization appli- | 
ances to a gas vent, chimney, or single-wall 
metal pipe, except where the gas vent, chimney, 
or single-wall metal pipe is directly connected 
to the appliance. [NFPA 54:12.11.1] I 

510.10.2 Materials. 

510.10.2.1 A vent connector shall be made 
of noncombustible, corrosion resistant 
material capable of withstanding the vent 
gas temperature produced by the gas 
utilization appliance and of sufficient 
thickness to withstand physical damage. 
[NFPA 54:12.11.2.1] 

510.10.2.2 Where the vent connector used 
for gas utilization appliances having a draft | 
hood or a Category I appliance is located in 



61 



510.10 -Table 5-6 



UNIFORM PLUMBING CODE 



or passes through an unconditioned area, 
that portion of the vent connector shall be 
listed Type B, Type L, or listed vent material 
having equivalent insulation qualities. 
[NFPA 54:12.11.2.2] 

Exception: Single-wall metal pipe 
located within the exterior walls of the 
building and located in areas having a 
local 99 percent winter design tempera- 
ture of 5°F (-15°C) or higher. 

510.10.2.3 Where the vent connector used 
for gas utilization appliances having a draft 
hood or a Category I appliance is located in 
or passes through attics and crawl spaces, 
that portion of the vent connector shall be 
listed Type B, Type L, or listed vent material 
having equivalent insulation qualities. 
[NFPA 54:12.11.2.3] 

510.10.2.4 Vent connectors for residential- 
type appliances shall comply with the 
following [NFPA 54:12.11.2.4]: 

(1) Vent connectors for listed gas appliances 
having draft hoods and for appliances 
having draft hoods and equipped with 
listed conversion burners that are not 
installed in attics, crawl spaces, or other 
unconditioned areas shall be one of the 
following: [NFPA 54: 12.11.2.4(1)] 

(a) Type B or Type L vent material. 

(b) Galvanized sheet steel at least 0.018 
inches (0.46 mm) thick. 

(c) Aluminum (1100 or 3003 alloy or 
equivalent) sheet at least 0.027 
inches (0.69 mm) thick. 

(d) Stainless steel sheet at least 0.012 
inches (0.31 mm) thick. 

(e) Smooth interior wall metal pipe 
having resistance to heat and corro- 
sion equal to or exceeding that of b, 
c, or d above. 

(f) A listed vent connector. 

(2) Vent connectors shall not be covered 
with insulation. 

Exception: Listed insulated vent 
connectors shall be installed in 
accordance with the manufacturer's 
installation instructions. [NFPA 
54:12.11.2.4(2)] 

510.10.2.5 A vent connector for non-resi- 
dential low-heat appliance shall be a 
factory-built chimney section or steel pipe 
having resistance to heat and corrosion 



equivalent to that for the appropriate galva- 
nized pipe as specified in Table 5-5. Factory- 
built chimney sections shall be joined 
together in accordance with the chimney 
manufacturer's instructions. [NFPA 
54:12.11.2.5] 

510.10.2.6 Vent connectors for medium- 
heat appliances and commercial and indus- 
trial incinerators shall be constructed of 
factory-built, medium-heat chimney 
sections or steel of a thickness at least that 
specified in Table 5-6 and shall comply with 
the following [NFPA 54:12.11.2.6]: 

(1) A steel vent connector for appliances 
with a vent gas temperature exceeding 
1,000°F (538°C) measured at the 
entrance to the connector shall be lined 
with medium-duty fire brick (ASTM C 
64, Specification for Refractories for Incin- 
erators and Boilers, Type F) or the equiva- 
lent. 

(2) The lining shall be at least two and one- 
half (2-1/2) inches (64 mm) thick for a 
vent connector having a diameter or 
greatest cross-sectional dimension of 
eighteen (18) inches (460 mm) or less. 

(3) The lining shall be at least four and one- 
half (4-1/2) inches (110 mm) thick laid 
on the four and one-half (4-1/2) inch 
(110 mm) bed for a vent connector 
having a diameter or cross-sectional 
dimension exceeding eighteen (18) 
inches (460 mm). 

(4) Factory-built chimney sections, if 
employed, shall be joined together in 
accordance with the chimney manufac- 
turer's instructions. 

Table 5-6 
Minimum Thickness for Steel Vent Connectors 
for Medium-Heat Appliances and Commercial | 

and Industrial Incinerators 

[NFPA 54: Table 12.11.2.6] 



Vent Connector Size 








Minimum 


Diameter (in.) 


Area (in. 2 ) 


Thickness (in.) 


Up to 14 


Up to 154 


0.053 


Over 14 to 16 


154 to 201 


0.067 


Over 16 to 18 


201 to 254 


0.093 


Over 18 


Exceeding 254 


0.123 



For SI units, 1 in. = 25.4 mm; 1 in." = 645 mm". 



62 



WATER HEATERS 



510.10 



510.10.3 Size of Vent Connector. 

510.10.3.1 A vent connector for gas utiliza- 
tion appliances with a single draft hood or 
for a Category I fan-assisted combustion 
system appliance shall be sized and installed 
in accordance with this chapter or other 
approved engineering methods. [NFPA 
54:12.11.3.1] 

510.10.3.2 For a single appliance having 
more than one (1) draft hood outlet or flue 
collar, the manifold shall be constructed 
according to the instructions of the appli- 
ance manufacturer. Where there are no 
instructions, the manifold shall be designed 
and constructed in accordance with 
approved engineering practices. As an alter- 
nate method, the effective area of the mani- 
fold shall equal the combined area of the 
flue collars or draft hood outlets, and the 
vent connectors shall have a minimum one 
(1) foot (0.3 m) rise. [NFPA 54:12.11.3.2] 

510.10.3.3 Where two (2) or more gas appli- 
ances are connected to a common vent or 
chimney, each vent connector shall be sized 
in accordance with this chapter or other 
approved engineering methods. [NFPA 
54:12.11.3.3] As an alternative method appli- 
cable only when the appliances are draft- 
hood-equipped, each vent connector shall 
have an effective area at least the area of the 
draft hood outlet of the appliance to which 
it is connected. [NFPA 54:12.11.3.4] 

510.10.3.4 Where two (2) or more gas appli- 
ances are vented through a common vent 
connector or vent manifold, the common 
vent connector or vent manifold shall be 
located at the highest level consistent with 
available head-room and clearance to 
combustible material and shall be sized in 
accordance with this chapter or other 
approved engineering methods. [NFPA 
54:12.11.3.5] 

As an alternate method applicable only 
where there are two (2) draft-hood-equipped 
appliances, the effective area of the common 
vent connector or vent manifold and junc- 
tion fittings shall be at least the area of the 
larger vent connector plus 50 percent of the 
areas of smaller flue collar outlets. [NFPA 
54:12.11.3.6] 

510.10.3.5 Where the size of a vent 
connector is increased to overcome installa- 
tion limitations and obtain connector 
capacity equal to the appliance input, the 
size increase shall be made at the appliance 
draft hood outlet. [NFPA 54:12.11.3.7] 



510.10.4 Two or More Appliances Connected 
to a Single Vent. 

510.10.4.1 Where two (2) or more openings 
are provided into one (1) chimney flue or 
vent, the openings shall either be at 
different levels, or the connectors shall be 
attached to the vertical portion of the 
chimney or vent at an angle of 45 degrees or 
less relative to the vertical. [NFPA 54- 
09:12.11.4.1] 

510.10.4.2 Where two (2) or more vent 
connectors enter a common gas vent, 
chimney flue, or single-wall metal pipe, the 
smaller connector shall enter at the highest 
level consistent with the available headroom 
or clearance to combustible material. [NFPA 
54:12.11.4.1] 

510.10.4.3 Vent connectors serving Cate- 
gory I appliances shall not be connected to 
any portion of a mechanical draft system 
operating under positive static pressure, 
such as those serving Category III or Cate- 
gory IV appliances. [NFPA 54:12.11.4.2] 

510.10.5 Clearance. Minimum clearances from 
vent connectors to combustible material shall be 
in accordance with Table 5-3. [NFPA 54:12.11.5] 

Exception: The clearance between a vent 
connector and combustible material shall be 
permitted to be reduced where the 
combustible material is protected as speci- 
fied for vent connectors in Table 5-4. 

510.10.6 Avoid Unnecessary Bends. A vent 
connector shall be installed so as to avoid turns 
or other construction features that create exces- 
sive resistance to flow of vent gases. [NFPA 
54:12.11.6] 

510.10.7 Joints. Joints between sections of 
connector piping and connections to flue collars 
or draft hood outlets shall be fastened in accor- 
dance with one of the following methods [NFPA 
54:12.11.7]: 

(1) By sheet metal screws. 

(2) Vent connectors of listed vent material shall 
be assembled and connected to flue collars 
or draft hood outlets in accordance with the 
manufacturer's instructions. 

(3) Other approved means. 

510.10.8 Slope. A vent connector shall be 
installed without any dips or sags and shall slope 
upward toward the vent or chimney not less than 
one-quarter (1/4) inch/ foot (20 mm/m). [NFPA 
54:12.11.8] 

Exception: Vent connectors attached to a 
mechanical draft system installed in accor- » 
dance with the appliance and draft system I 
manufacturer's instructions. 



63 



510.10-510.12 



UNIFORM PLUMBING CODE 



510.10.9 Length of Vent Connector. 

510.10.9-1 A vent connector shall be as 
short as practical and the gas utilization 
appliance located as close as practical to the 
chimney or vent. [NFPA 54:12.11.9.1] 

510.10.9.2 The maximum horizontal length 
of a single- wall connector shall be 75 percent 
of the height of the chimney or vent except 
for engineered systems. [NFPA 54- 
09:12.11.9.2] 

510.10.9.3 The maximum horizontal length 
of a Type B double-wall connector shall be 
100 percent of the height of the chimney or 
vent, except for engineered systems. The 
maximum length of an individual connector 
for a chimney or vent system serving multiple 
appliances, from the appliance outlet to the 
junction with the common vent or another 
connector, shall be 100 percent of the height of 
the chimney or vent. [NFPA 54:12.11.9.3] 

510.10.10 Support. A vent connector shall be 
supported for the design and weight of the 
material employed to maintain clearances and 
prevent physical damage and separation of 
joints. [NFPA 54:12.11.10] 

510.10.11 Chimney Connection. Where 
entering a flue in a masonry or metal chimney, 
the vent connector shall be installed above the 
extreme bottom to avoid stoppage. Where a 
thimble or slip joint is used to facilitate removal 
of the connector, the connector shall be firmly 
attached to or inserted into the thimble or slip 
joint to prevent the connector from falling out. 
Means shall be employed to prevent the 
connector from entering so far as to restrict the 
space between its end and the opposite wall of 
the chimney flue. [NFPA 54:12.11.11] 

510.10.12 Inspection. The entire length of a 
vent connector shall be readily accessible for 
inspection, cleaning, and replacement. [NFPA 
54:12.11.12] 

510.10.13 Fireplaces. A vent connector shall 
not be connected to a chimney flue serving a 
fireplace unless the fireplace flue opening is 
permanently sealed. [NFPA 54:12.11.13] 

510.10.14 Passage through Ceilings, Floors, 
or Walls. 

510.10.14.1 A vent connector shall not pass 
through any ceiling, floor, or fire-resistance- 
rated wall. A single-wall metal pipe 
connector shall not pass through any inte- 
rior wall. 

Exception: Vent connectors made of 
listed Type B or Type L vent material 



and serving listed appliances with draft I 
hoods and other appliances listed for | 
use with Type B gas vents that pass 
through walls or partitions constructed 
of combustible material shall be 
installed with not less than the listed 
clearance to combustible material. 

510.10.14.2 Vent connectors for medium- 
heat appliances shall not pass through walls I 
or partitions constructed of combustible 
material. [NFPA 54:12.11.14.3] 

510.11 Vent Connectors for Category II, Category 
III, and Category IV Gas Utilization Appliances. I 

(See Section 510.4.) [NFPA 54:12.12] 

510.12 Draft Hoods and Draft Controls. 

510.12.1 Appliances Requiring Draft Hoods. 1 

Vented gas utilization appliances shall be 1 
installed with draft hoods. [NFPA 54:12.13.1] 

Exception: Dual oven-type combination 
ranges; incinerators; direct-vent appliances; | 
fan-assisted combustion system appliances; I 
appliances requiring chimney draft for oper- I 
ation; single firebox boilers equipped with 
conversion burners with inputs exceeding 
400,000 Btu/h (117 kW); appliances 
equipped with blast, power, or pressure 
burners that are not listed for use with draft 
hoods; and appliances designed for forced I 
venting. 

510.12.2 Installation. A draft hood supplied 
with or forming a part of listed vented gas 
utilization appliances shall be installed without | 
alteration, exactly as furnished and specified by 
the appliance manufacturer. [NFPA 54:12.13.2] | 

If a draft hood is not supplied by the appli- 1 
ance manufacturer where one (1) is required, a 
draft hood shall be installed, be of a listed or 
approved type, and, in the absence of other 
instructions, be of the same size as the appliance I 
flue collar. Where a draft hood is required with a 
conversion burner, it shall be of a listed or 
approved type. [NFPA 54: 12.13.2.1] 

Where it is determined that a draft hood of 
special design is needed or preferable for a 
particular installation, the installation shall be in 
accordance with the recommendations of the 
appliance manufacturer and shall be approved I 
by the Authority Having Jurisdiction. [NFPA 
54:12.13.2.2] 

510.12.3 Draft-Control Devices. Where a draft- 
control device is part of the gas utilization appli- I 
ance or is supplied by the appliance manufac- I 
turer, it shall be installed in accordance with the 



64 



WATER HEATERS 



510.12-511.1 



manufacturer's instructions. In the absence of 
manufacturer's instructions, the device shall be 
| attached to the flue collar of the appliance or as 
near to the appliance as practical. [NFPA 
54:12.13.3] 

510.12.4 Additional Devices. Gas utilization 

I appliances (except incinerators) requiring 

controlled chimney draft shall be permitted to be 
equipped with a listed double-acting barometric 
draft regulator installed and adjusted in accor- 
dance with the manufacturer's instructions. 
[NFPA 54:12.13.4] 

510.12.5 Location. Draft hoods and barometric 
draft regulators shall be installed in the same 

| room or enclosure as the appliance in such a 

manner as to prevent any difference in pressure 
between the hood or regulator and the combus- 
tion air supply. [NFPA 54:12.13,5] 

510.12.6 Positioning. Draft hoods and draft 
regulators shall be installed in the position for 
which they were designed with reference to the 
horizontal and vertical planes and shall be 
located so that the relief opening is not 

I obstructed by any part of the appliance or adja- 

I cent construction. The appliance and its draft 

hood shall be located so that the relief opening is 

accessible for checking vent operation. [NFPA 

54:12.13.6] 

510.12.7 Clearance. A draft hood shall be 
located so that its relief opening is at least six (6) 
inches (150 mm) from any surface except that of 

| the appliance it serves and the venting system to 
which the draft hood is connected. Where a 
greater or lesser clearance is indicated on the 

| appliance label, the clearance shall not be less 

than that specified on the label. Such clearances 
shall not be reduced. [NFPA 54:12.13.7] 

510.13 Manually Operated Dampers. A manually 
| operated damper shall not be placed in any appli- 
ance vent connector. Fixed baffles shall not be classi- 
fied as manually operated dampers. [NFPA 54:12.14] 

510.14 Automatically Operated Vent Dampers. An 
automatically operated vent damper shall be of a 
listed type. [NFPA 54:12.15] 

510.15 Obstructions. Devices that retard the flow of 
vent gases shall not be installed in a vent connector, 
chimney, or vent. The following shall not be consid- 
ered as obstructions [NFPA 54:12.16]: 

(1) Draft regulators and safety controls specifically 
listed for installation in venting systems and 
installed in accordance with the terms of their 
listing. 

(2) Approved draft regulators and safety controls 
designed and installed in accordance with 
approved engineering methods. 



(3) Listed heat reclaimers and automatically oper- 
ated vent dampers installed in accordance with 
the terms of their listing. 

(4) Vent dampers serving listed appliances installed 
in accordance with this chapter or other 
approved engineering methods. 

(5) Approved economizers, heat reclaimers, and 
recuperators installed in venting systems of 
appliances not required to be equipped with I 
draft hoods, provided the gas utilization appli- | 
ance manufacturer's instructions cover the 
installation of such a device in the venting 
system and performance in accordance with 
Sections 510.3.1 and 510.3.2 is obtained. 

511.0 Sizing of Category I Venting Systems. 

511.1 These venting tables shall not be used where 
obstructions (see Section 510.15) are installed in the 
venting system. The installation of vents serving 
listed appliances with vent dampers shall be in 
accordance with the appliance manufacturer's 
instructions or in accordance with the following 
[NFPA 54:13.1.1]: 

(1) The maximum capacity of the vent system shall 
be determined using the NAT Max column. 

(2) The minimum capacity shall be determined as 
though the appliance were a fan-assisted appli- 
ance, using .the FAN Min column to determine 
the minimum capacity of the vent system. Where 
the corresponding "FAN Min" is "NA" the vent 
configuration shall not be permitted and an alter- 
native venting configuration shall be utilized. 

511.1.1 Where the vent size determined from 
the tables is smaller than the appliance draft 
hood outlet or flue collar, the use of the smaller 
size shall be permitted provided that the instal- 
lation complies with the following requirements 
[NFPA 54:13.1.2]: 

(1) The total vent height (H) is at least ten (10) 
feet (3 m). 

(2) Vents for appliance draft hood outlets or 
flue collars twelve (12) inches (300 mm) in 
diameter or smaller are not reduced more 
than one (1) table size. 

(3) Vents for appliance draft hood outlets or 
flue collars exceeding twelve (12) inches 
(300 mm) in diameter are not reduced more 
than two (2) table sizes. 

(4) The maximum capacity listed in the tables 
for a fan-assisted appliance is reduced by 10 
percent (0.90 maximum table capacity). 

(5) The draft hood outlet exceeds four (4) inches 
(100 mm) in diameter. Do not connect a 



65 



511.1 



UNIFORM PLUMBING CODE 



three (3) inch (80 mm) diameter vent to a 
four (4) inch (100 mm) diameter draft hood 
outlet. This provision shall not apply to fan- 
assisted appliances. 

511.1.2 Elbows. Single-appliance venting 
configurations with zero (0) lateral lengths in 
Tables 5-8, 5-9, and 5-12 shall have no elbows in 
the venting system. Single-appliance venting 
with lateral lengths, include allowance for two 
(2) 90 degree elbows. For each additional elbow 
up to and including 45 degrees, the maximum 
capacity listed in the venting tables shall be 
reduced by 5 percent. For each additional elbow 
exceeding 45 degrees up to and including 90 
degrees, the maximum capacity listed in the 
venting tables shall be reduced by 10 percent. 
[NFPA 54:13.1.3] 

Where multiple offsets occur in a vent, the 
total lateral length of all offsets combined shall not 
exceed that specified in Tables 5-8 through 5-12. 
[NFPA 54-09:13.1.3] 

511.1.3 Zero (0) lateral (L) shall apply only to a 
straight vertical vent attached to a top outlet 
draft hood or flue collar. [NFPA 54:13.1.4] 

511.1.4 Sea level input ratings shall be used 
when determining maximum capacity for high- 
altitude installation. Actual input (derated for 
altitude) shall be used for determining minimum 
capacity for high-altitude installation. [NFPA 
54:13.1.5] 

511.1.5 For appliances with more than one (1) 
input rate, the minimum vent capacity (FAN 
Min) determined from the tables shall be less 
than the lowest appliance input rating, and the 
maximum vent capacity (FAN Max /NAT Max) 
determined from the tables shall exceed the 
highest appliance rating input. [NFPA 54:13.1.6] 

51 1 .1 .6 Listed corrugated metallic chimney liner 
systems in masonry chimneys shall be sized by 
using Tables 5-8 or 5-9 for Type B vents with the 
maximum capacity reduced by 20 percent (0.80 
maximum capacity) and the minimum capacity 
as shown in Tables 5-8 or 5-9. 

Corrugated metallic liner systems installed 
with bends or offsets shall have their maximum 
capacity further reduced in accordance with 
Section 511.1.2. The 20 percent reduction for 
corrugated metallic chimney liner systems 
includes an allowance for one (1) long radius 90 
degree turn at the bottom of the liner. [NFPA 
54:13.1.7] 

511.1.7 Connection to Chimney Liners. 

Connections between chimney liners and listed 
double-wall connectors shall be made with listed 
adapters designed for such purposes. [NFPA 
54:13.1.8] 



511.1.8 Vertical Vent Upsizing 7 x Rule. 

Where the vertical vent has a larger diameter 
than the vent connector, the vertical vent diam- 
eter shall be used to determine the minimum 
vent capacity, and the connector diameter shall 
be used to determine the maximum vent 
capacity. The flow area of the vertical vent shall 
not exceed seven (7) times the flow area of the 
listed appliance categorized vent area, flue collar 
area, or draft hood outlet area unless designed in 
accordance with approved engineering methods. 
[NFPA 54:13.1.9] 

511.1.9 Draft Hood Conversion Accessories. 

Draft hood conversion accessories for use with 
masonry chimneys venting listed Category I fan- 
assisted appliances shall be listed and installed 
in accordance with the listed accessory manufac- 
turer's installation instructions. [NFPA 
54:13.1.10] 

511.1.10 Tables 5-8 through 5-12 shall be used 
for chimneys and vents not exposed to the 
outdoors below the roof line. A Type B vent or 
listed chimney lining system passing through an 
unused masonry chimney flue shall not be 
considered to be exposed to the outdoors. A 
Type B vent passing through an unventilated 
enclosure or chase insulated to a value of at least 
R8 shall not be considered to be exposed to the 
outdoors. Table 5-10 in combination with Table 
5-13 shall be used for clay-tile-lined exterior 
masonry chimneys, provided the following are 
met [NFPA 54:13.1.11]: 

(1) The vent connector is Type B double wall. 

(2) The vent connector length is limited to one 
and one-half (1-1/2) feet for each inch (18 
mm/ mm) of vent connector diameter. 

(3) The appliance is draft-hood-equipped. 

(4) The input rating is less than the maximum 
capacity given in Table 5-10. 

(5) For a water heater, the outdoor design 
temperature shall be not less than 5°F (-15°C). 

(6) For a space-heating appliance, the input 
rating exceeds the minimum capacity given 
by Table 5-13. 

511.1.11 Corrugated vent connectors shall not 
be smaller than the listed appliance categorized 
vent diameter, flue collar diameter, or draft 
hood outlet diameter. [NFPA 54:13.1.12] 

511.1.12 Vent connectors shall not be upsized 
more than two (2) sizes exceeding the listed 
appliance categorized vent diameter, flue collar 
diameter, or draft hood outlet diameter. [NFPA 
54:13.1.13] 



66 



WATER HEATERS 



511.1 -511.2 



511.1.13 In a single run of vent or vent 
connector, more than one (1) diameter and type 
shall be permitted to be used, provided that the 
sizes and types are permitted by the tables. 
[NFPA 54:13.1.14] 

511.1.14 Interpolation shall be permitted in 
calculating capacities for vent dimensions that 
fall between table entries. (See Part II-Example 
G.1.3.)[NFPA 54:13.1.15] 

511.1.15 Extrapolation beyond the table entries 
shall not be permitted. [NFPA 54:13.1.16] 

511.1.16 For vent heights lower than six (6) feet 
and exceeding vent heights shown in the tables, 
engineering methods shall be used to calculate 
vent capacities. [NFPA 54:13.1.17] 

511.2 Additional Requirements to Multiple Appli- 
ance Vent Table 5-14 through Table 5-22. 

511.2.1 Obstructions and Vent Damper. These 
venting tables shall not be used where obstructions 
(see Section 510.15) are installed in the venting 
system. The installation of vents serving listed 
appliances with vent dampers shall be in accor- 
dance with the appliance manufacturer's instruc- 
tions or in accordance with the following [NFPA 
54:13.2.1]: 

(1) The maximum capacity of the vent 
connector shall be determined using the 
NAT Max column. 

(2) The maximum capacity of the vertical vent 
or chimney shall be determined using the 
FAN + NAT column when the second appli- 
ance is a fan-assisted appliance, or the NAT 
+ NAT column when the second appliance 
is equipped with a draft hood. 

(3) The minimum capacity shall be determined 
as if the appliance were a fan-assisted appli- 
ance. 

(a) The minimum capacity of the vent 
connector shall be determined using the 
FAN Min column. 

(b) The FAN + FAN column shall be used 
when the second appliance is a fan- 
assisted appliance, and the FAN + NAT 
column shall be used when the second 
appliance is equipped with a draft hood, 
to determine whether the vertical vent 
or chimney configuration is not 
permitted (NA). Where the vent config- 
uration is NA, the vent configuration 
shall not be permitted and an alternative 
venting configuration shall be utilized. 

511.2.2 The vent connector horizontal length 
shall be eighteen (18) inches /inch (18 mm /mm) 
of connector diameter as shown in Table 5-7 . 
[NFPA 54:13.2.2] 



TABLE 5-7 

Vent Connector Maximum Length 

[NFPA 54: Table 13.2.2] 



Connector Diameter 


Connector Horizontal 


Maximum (in.) 


Length (ft.) 


3 


4-1/2 


4 


6 


5 


7-1/2 


6 


9 


7 


10-1/2 


8 


12 


9 


13-1/2 


10 


15 


12 


18 


14 


21 


16 


24 


18 


27 


20 


30 


22 


33 


24 


36 



For SI units, 1 in. = 25.4 mm; 1 ft. = 0.305 m. 

51 1 .2.3 The vent connector shall be routed to the 
vent utilizing the shortest possible route. 
Connectors with longer horizontal lengths than 
those listed in Table 5-7 are permitted under the 
following conditions [NFPA 54:13.2.3]: 

(A) The maximum capacity (FAN Max or NAT 
Max) of the vent connector shall be reduced 
10 percent for each additional multiple of 
the length listed in Table 5-7. For example, 
the length listed for a four (4) inch (100 mm) 
connector shall not exceed six (6) feet (1.8 
m). With a connector length exceeding six 
(6) feet (1.8 m) but not exceeding twelve (12) 
feet (3.7 m), the maximum capacity must be 
reduced by 10 percent (0.90 maximum vent 
connector capacity). With a connector length 
exceeding twelve (12) feet (3.7 m) but not 
exceeding eighteen (18) feet (5.5 m), the 
maximum capacity must be reduced by 20 
percent (0.80 maximum vent capacity) 
[NFPA 54:13.2.3(1)]. 

(B) For a connector serving a fan-assisted appli- 
ance, the minimum capacity (FAN Min) of the 
connector shall be determined by referring to 
the corresponding single appliance table. For 
Type B double-wall connectors, Table 5-8 
shall be used. For single-wall connectors, 
Table 5-9 shall be used. The height (H) and 
lateral (L) shall be measured according to the 



67 



511.2 



UNIFORM PLUMBING CODE 



procedures for a single appliance vent as if 
the other appliances were not present. [NFPA 
54:13.2.3(2)] 

511.2.4 Where the vent connectors are 
combined prior to entering the vertical portion 
of the common vent to form a common vent 
manifold, the size of the common vent mani- 
fold and the common vent shall be determined 
by applying a 10 percent reduction (.90 x 
maximum common vent capacity) to the 
Common Vent Capacity part of the common 
vent tables. The length of the common vent 
connector manifold (LM) shall not exceed eigh- 
teen (18) inches /inch (18 mm /mm) of common 
vent connector manifold diameter (D). (See 
Part II-Figure G.l(k).) [NFPA 54:13.2.4] 

511.2.5 Vent Offset. Where the common 
vertical vent is offset the maximum capacity of 
the common vent shall be reduced in accordance 
with Section 511.2.6, and the horizontal length of 
the common vent offset shall not exceed eigh- 
teen (18) inches /inch (18 mm /mm) of common 
vent diameter. Where multiple offsets occur in a 
common vent, the total horizontal length of 
offsets combined shall not exceed eighteen (18) 
inches/inch (18 mm/mm) of common vent 
diameter. [NFPA 54:13.2.5] 

51 1 .2.6 For each elbow up to and including 45 
degrees in the common vent, the maximum 
common vent capacity listed in the venting 
tables shall be reduced by 5 percent. For each 
elbow exceeding 45 degrees up to and including 
90 degrees, the maximum common vent capacity 
listed in the venting tables shall be reduced by 
10 percent. [NFPA 54:13.2.6] 

511.2.7 Common Vent Minimum Size. The 

cross-sectional area of the common vent shall be 
equal to or exceeding the cross-sectional area of 
the largest connector. [NFPA 54:13.2.8] 

511.2.8 Tee and Wye Fittings. Tee and wye 

fittings connected to a common gas vent shall be 
considered as part of the common gas vent and 
constructed of materials consistent with that of 
the common gas vent. [NFPA 54-09:13.2.9] 

511.2.9 At the point where tee or wye fittings 
connect to a common vent, the opening size of 
the fitting shall be equal to the size of the 
common vent. Such fittings shall not be prohib- 
ited from having reduced size openings at the 
point of connection of appliance vent connectors. 
[NFPA 54:13.2.10] 

511.2.10 Sea level input ratings shall be used 
when determining maximum capacity for high- 
altitude installation. Actual input (derated for 



altitude) shall be used for determining minimum 
capacity for high-altitude installation. [NFPA 
54:13.2.11] 

511.2.11 The connector rise (R) for each appli- 
ance connector shall be measured from the draft 
hood outlet or flue collar to the centerline where 
the vent gas streams come together. [NFPA 
54:13.2.12] 

511.2.12 For multiple units of gas utilization 
appliances located on one (1) floor, available [ 
total height (H) shall be measured from the 
highest draft hood outlet or flue collar up to the 
level of the outlet of the common vent. [NFPA 
54:13.2.13] 

511.2.13 For multistory installations, available 
total height (H) for each segment of the system 
shall be the vertical distance between the highest 
draft hood outlet or flue collar entering that 
segment and the centerline of the next higher 
interconnection tee. (See Part II-Figure G.l(m).) 
[NFPA 54:13.2.14] 

511.2.14 The size of the lowest connector and of 
the vertical vent leading to the lowest intercon- 
nection of a multistory system shall be in accor- 
dance with Tables 5-8 or 5-9 for available total 
height (H) up to the lowest interconnection. (See 
Part II-Figure G.l(n).) [NFPA 54:13.2.15] 

511.2.15 Where used in multistory systems, 
vertical common vents shall be Type B double- 
wall and shall be installed with a listed vent cap. 
[NFPA 54:13.2.16] 

511.2.16 Offsets in multistory common vent 
systems shall be limited to a single offset in each 
system, and systems with an offset shall comply 
with all of the following [NFPA 54:13.2.17]; 

(1) The offset angle shall not exceed 45 degrees 
from vertical. 

(2) The horizontal length of the offset shall not 
exceed eighteen (18) inches for each inch 
(180 mm /mm) of common vent diameter of 
the segment in which the offset is located. 

(3) For the segment of the common vertical vent 
containing the offset, the common vent 
capacity listed in the common venting tables 
shall be reduced by 20 percent (0.80 x 
maximum common vent capacity). 

(4) A multistory common vent shall not be 
reduced in size above the offset. 

511.2.17 Where two (2) or more appliances are 
connected to a vertical vent or chimney, the flow 
area of the largest section of vertical vent or 
chimney shall not exceed seven (7) times the 



68 



WATER HEATERS 



51 1.2 -Figure 5-7 



smallest listed appliance categorized vent areas, 
flue collar area, or draft hood outlet area unless 
designed in accordance with approved engi- 
neering methods. [NFPA 54:13.2.18] 

511.2.18 For appliances with more than one (1) 
input rate, the minimum vent connector capacity 
(FAN Min) determined from the tables shall be 
less than the lowest appliance input rating, and 
the maximum vent connector capacity (FAN 
Max or NAT Max) determined from the table 
shall exceed the highest appliance input rating. 
[NFPA 54:13.2.19] 

511.2.19 Listed corrugated metallic chimney 
liner systems in masonry chimneys shall be 
sized by using Tables 5-14 or 5-15 for Type B 
vents, with the maximum capacity reduced by 
20 percent (0.80 maximum capacity) and the 
minimum capacity as shown in Tables 5-14 or 5- 
15. Corrugated metallic liner systems installed 
with bends or offsets shall have their maximum 
capacity further reduced in accordance with 
Sections 511.2.5 and 511.2.6. The 20 percent 
reduction for corrugated metallic chimney liner 
systems includes an allowance for one (1) long 
radius 90 degree turn at the bottom of the liner. 
[NFPA 54:13.2.20] 

51 1 .2.20 Tables 5-14 and 5-15 shall be used for 
chimneys and vents not exposed to the outdoors 
below the roof line. A Type B vent passing 
through an unventilated enclosure or chase insu- 
lated to a value of not less than R8 shall not be 
considered to be exposed to the outdoors. Tables 
5-19 and 5-20 shall be used for clay-tile-lined 
exterior masonry chimneys, provided all of the 
following conditions are met [NFPA 54:13.2.22]: 

(1) Vent connector is Type B double-wall. 

(2) One (1) appliance is draft-hood-equipped. 

(3) The combined appliance input rating is less 
than the maximum capacity given by Table 
5-19 (for NAT + NAT) or Table 5-21 (for 
FAN + NAT). 

(4) The input rating of each space-heating 
appliance exceeds the minimum input 
rating given by Table 5-20 (for NAT + NAT) 
or Table 5-22 (for FAN + NAT). 

(5) The vent connector sizing is in accordance 
with Table 5-16. 

511.2.21 Vent connectors shall not be increased 
more than two (2) sizes exceeding the listed 
appliance categorized vent diameter, flue collar 
diameter, or draft hood outlet diameter. Vent 
connectors for draft-hood-equipped appliances 



shall not be smaller than the draft hood outlet 
diameter. Where vent connector sizes deter- 
mined from the tables for fan-assisted appliances 
are smaller than the flue collar diameter, the use 
of the smaller sizes shall be permitted provided 
that the installation complies with all of the 
following conditions [NFPA 54:13.2.24]: 

(1) Vent connectors for fan-assisted appliance 
flue collars twelve (12) inches (300 mm) in 
diameter or smaller are not reduced by more 
than one (1) table size [e.g., twelve (12) 
inches to ten (10) inches (300 mm to 250 
mm) is a one (1) size reduction] and those 
exceeding twelve (12) inches (300 mm) in 
diameter are not reduced exceeding two (2) 
table sizes [e.g., twenty-four (24) inch to 
twenty (20) inch (610 mm to 510 mm) is a 
two (2) size reduction]. 

(2) Fan-assisted appliances are common vented 
with a draft-hood-equipped appliance. 

(3) The vent connector has a smooth interior 
wall 

511.2.22 Combinations of pipe sizes, single- 
wall, and double-wall metal pipe shall be 
allowed within any connector run or within the 
common vent, provided ALL of the appropriate 
tables permit ALL of the desired sizes and types 
of pipe, as if they were used for the entire length 



Chimney or gas vent 




Opening 



J« — Opening 







i i i i ! 1 i 1 


[ 


1 ' 1 1 1 1 ' 1 1 11 


,, L .1 


1 1 VI \ 1 1 1 1 


I i 



FIGURE 5-7 Combustion Air from Adjacent 
Indoor Spaces through Indoor Combustion Air 
Openings. [NFPA 54: Figure A.9.3.2.3(1)] 



69 



511.2-512.0 



UNIFORM PLUMBING CODE 



of the subject connector or vent. Where single- 
wall and Type B double-wall metal pipes are 
used for vent connectors within the same 
venting system, the common vent must be sized 
using Tables 5-15 or 5-17 as appropriate. [NFPA 
54:13.2.25] 

51 1 .2.23 Where a table permits more than one 
(1) diameter of pipe to be used for a connector or 
vent, all the permitted sizes shall be permitted to 
be used. [NFPA 54:13.2.26] 

511.2.24 Interpolation shall be permitted in 
calculating capacities for vent dimensions that 
fall between table entries. (See Part II Annex 
G.1.3.) [NFPA 54:13.2.27] 

51 1 .2.25 Extrapolation beyond the table entries 
shall not be permitted. [NFPA 54:13.2.28] 

511.2.26 For vent heights lower than six (6) feet 
and exceeding vent heights shown in the tables, 
engineering methods shall be used to calculate 
vent capacities. [NFPA 54:13.2.29] 

I 512.0 Direct- Vent Appliances. 

I Listed direct-vent gas utilization appliances shall be 
considered properly vented where installed in accor- 
dance with the terms of its listing, the manufac- 
turer's instructions, and Section 510.8.3. [NFPA 
54:12.3.5] 



70 



WATER HEATERS 



Figure 5-8 - Figure 5-1 1 



- Chimney or ga$ vent 



Ventilation louvers 
(each end of attic) 




<— Ventilation louvers for - 
unhealed crawl space 



• Chimney or gas vent 




FIGURE 5-8 All Combustion Air from Outdoors. 
Inlet Air from Ventilated Crawl Space and Outlet 
Air to Ventilated Attic. [NFPA 54: Figure 
A.9.3.3.1(a)] 



Chimney or gas vent 



111 



Ventilation louvers 
each end of attic) 




Inlet air duct 
[ends 1ft (300 mm) 
above floor) 



FIGURE 5-10 All Combustion Air from Outdoors 
through Horizontal Ducts. [NFPA 54: Figure 
A.9.3.3.1(2)] 



Chimney or gas vent 



X 




Opening 



^Alternate 
opening 

location 



FIGURE 5-9 All Combustion Air from Outdoors 
through Ventilated Attic. [NFPA 54: Figure 
A.9.3.3.1(1)(b)] 



FIGURE 5-11 All Combustion Air from Outdoors 
through Single Combustion Air Opening. [NFPA 54: 
Figure A.9.3.3.2] 



71 



Figure 5-1 2 - Figure 5-1 3 



UNIFORM PLUMBING CODE 



Mechanical 
draft vent 
terminal 
(see 510.8,1) 




Direct vent terminal clearance 
Minimum clearance, C 
Input (Btu/hr) Clearance (in.) 

10.000 or less 

10.001 to 50,000 9 
Over 50,000 12 
(see 10,8.3) 

For SI units: 1 ft = 0.305 m; 1 in. = 25.4 mm: 
1 Btu/hr = 0.293 W 



Forced air 

iniet 



FIGURE 5-12 Exit Terminals of Mechanical Draft and Direct-Vent Venting Systems. [NFPA 54: Figure A.12.9] 



5T 
(-1S-C) 



17T 
(-ffC) 




37T 

<2°C) 



3TF 
(2°C) 



99% Winter Design Temperatures for the Contiguous United States 

This map is a necessarily generalized guide to temperatures in the contiguous United States. Temperatures shown for areas 
such as mountainous regions and large urban centers may not be accurate. The data used to develop this map are from the 
1 993 ASHRAE Handbook ■— Fundamentals (Chapter 24, Table 1 : Climate Conditions for the United States). 
For 99% winter design temperatures in Alaska, consult the ASHRAE Handbook — Fundamentals. 
99% winter design temperatures for Hawaii are greater than 37T. 

FIGURE 5-13 Range of Winter Design Temperatures Used in Analyzing Exterior Masonry Chimneys in 
the United States. [NFPA 54: Figure G.2.4] 



72 



WATER HEATERS 



Table 5-8 



Table 5-8 

Type B Double-Wall Gas Vent [NFPA 54: Table 13.1(a)] 











Number of Appliances: 


Single 


Appliance Type: 


Category 1 


Appliance Vent Connection: 


Connected Directly to Vent 












Vent Diameter - D (in. 


) 












3 


4 


5 


6 


7 








Appliance Input Rating in Thousands of Btu 


per Hour 








Height 
H 
(ft) 


Lateral 

L 

(ft) 


FAN 


NAT 


FAN 


NAT 


FAN NAT 


FAN 


NAT 


FAN 


NAT 


Min 


Max 


Max 


Min 


Max 


Max 


Min 


Max Max 


Min 


Max 


||||||j 


Min 


Max 


Max 


6 








78 


46 





152 


86 





251 141 





375 


205 





524 


285 




2 


13 


51 


36 


18 


97 


67 


27 


157 i 105 


32 


232 


157 


44 


321 


217 




4 


21 


49 


34 


30 


94 


64 


39 


153 103 


50 


227 


153 


66 


316 


211 




6 


25 


46 


' " '32 ' 


36 


91 


61 


47 


149 : 100 


59 


223 


149 


78 


310 


205 


8 








84 


50 





165 


'••\94.:: 





276 ipSSK. 





415 


235 





583 


320 




2 


12 


57 


40 


16 


109 


75 


25 


178 120 


28 


263 


im 


42 


365 


24.7 




5 


23 


53 


38 


32 


103 


"■■- 71- 


42 


171 115 


53 


255 


L73 


70 


356 


: : t : ::237: ; . : : 




8 


28 


49 


35 


39 


98 


;iHg 


51 


164 ; \m 


64 


247 


165 


84 


347 


§m§- 


10 








88 


• ' 53 





175 


100 





295 **mm 





447 


255 





631 


345 




2 


12 


61 


42 


17 


118 


81 


23 


194 : 129 


26 


289 


195 


40 


402 


,, mm 




5 


23 


57 


40 


32 


113 


71 


41 


187 124 


52 


280 


188 


68 


392 


263 




10 


30 


51 


ill! 


41 


104 


70 


54 


176 115 


67 


267 


llllll 


88 


376 


,:24E:- 


15 








94 


58 





191 


112 





327 . 187 





502 


285 





716 


390 




2 


11 


69 


48 


15 


136 


93 


20 


226 150 


22 


339 


llllll 


38 


475 


316 




5 


22 


65 


: ;:mr 


30 


130 


mmm 


39 


219 : 142 


49 


330 


217 


64 


463 


300 




10 


29 


59 


■41 


40 


121 


82 


51 


206 135 


64 


315 


208 


84 


445 


288 




15 


35 


53 


37 


48 


112 


mm. 


61 


195 128 


76 


301 


198 


98 


429 


• 275 


20 








97 


61 





202 


119 





349 202 





540 


■llllll:: 





776 


430 




2 


10 


75 


51 


14 


149 


100 


18 


250 166 


20 


377 


■fill 


33 


531 


346 




5 


21 


71 


48 


29 


143 


mm? 


38 


242 ; 160 


47 


367 


241 


62 


519 


337 




10 


28 


64 


44 


38 


133 


89 


50 


229 150 


62 


351 


■lilt 


81 


499 


321 




15 


34 


58 


40 


46 


124 


84 


59 


217 142. 


73 


337 


liiill 


94 


481 


308 




20 


48 


52 


;liW 


55 


116 


78 


69 


206 134 


84 


322 


mill 


107 


464 


295 


30 








100 


in 





213 


•\12&:, : 





374 mmk 





587 


336 





853 


^mm 




2 


9 


81 


iilfe 


13 


166 


112 


14 


283 mmn 


18 


432 


280 


27 


613 


394 




5 


21 


77 


gm$& 


28 


160 


108 


36 


275 176 


45 


421 


Illiii:: 


58 


600 


.:v38S ; * 




10 


27 


70 


50 


37 


150 


102 


48 


262 171 


59 


405 


261 


77 


580 


371 




15 


33 


64 


mmm 


44 


141 


96 


57 


249 .163 


70 


389 


249 


90 


560 


357 




20 


56 


58 


NA 


53 


132 


90 


66 


237 W$$M 


80 


374 


I!!!!! 


102 


542 


■ 343 




30 


NA 


NA 


KSIKi 


73 


113 


NA-:--' 


88 


214 NA 


104 


346 


2\9 


131 


507 


321 


50 








101 


fPMK 





216 


134 





397 232 





633 


363 





932 


^MM 




2 


8 


86 


61 


11 


183 


: 122 


14 


320 206 


15 


497 


314 


22 


715 


445 




5 


20 


82 


• NA 


27 


177 


119 


35 


312 200 


43 


487 


30$ 


55 


702 


438 




10 


26 


76 


NA 


35 


168 


114 


1 45 


299 190 


56 


471 


298 


73 


681 


426 




15 


59 


70 


NA 


42 


158 


pmm 


| 54 


287 180 


66 


455 


288 


85 


662 


413 




20 


NA 


NA 


NA 


50 


149 


;!:iMi 


63 


275 169 


76 


440 


278 


97 


642 


401 




30 


NA 


NA 


NA 


69 


131 


NA ■ 


84 


250 :§l§y: : 


99 


410 


llllll 


123 


605 


376 


100 





NA 


NA 


WM& 





218 


. NA-. 





407 umm 





665 


400 





997 


560 




2 


NA 


NA 


WMm 


10 


194 


NA 


I 12 


354 mmmi 


13 


566 


iliiii 


18 


831 


510 




5 


NA 


NA 


■ NA; 


26 


189 


■'.cN%£; 


33 


347 IfNli 


40 


557 


369 


52 


820 


504 




10 


NA 


NA 


^MM- 


33 


182 


■.••NA 


43 


335 ■ .NA 


53 


542 


3bl 


68 


801 


493 




15 


NA 


NA 


■cmm 


40 


174 


NA' 


50 


321 NA 


62 


528 


353 


80 


782 


482 




20 


NA 


NA 


NA 


47 


166 


^mmi 


59 


311 NA 


71 


513 


344 


90 


763 


471 




30 


NA 


NA 


i mm 


NA 


NA 


irMft'-i 


78 


290 m&m 


92 


483 


NA 


115 


726 


449 




50 


NA 


NA 


• NA 


NA 


NA 


mm 


NA 


NA : NA 


i 147 


428 


■ NA 


180 


651 


405 



For SI units, 1 in. - 25.4 mm, 1 ft. - 0.305 m, 1,000 Btu/hr = 0.293 kW, 1 in. 2 = 645 mm 2 . 



73 



Table 5-8 continued 



UNIFORM PLUMBING CODE 



Table 5-8 

Type B Double-Wall Gas Vent [NFPA 54: Table 13.1(a)] (continued) 











Number of Appliances: 


Single 


Appliance Type: 


Category 1 


Appliance Vent Connection: 


Connected Directly to Vent 


Vent Diameter - D (in.) 


8 


9 


10 


12 


14 








Appliance 


1 Input Rating 


in Thousands of Btu 


per Hour 








Height 
H 

(ft) 


Lateral 

L 
(ft) 


FAN 


NAT 


FAN 


NAT 


FAN NAT 


FAN 


NAT 

inni 


FAN 


NAT 


Min 


Max 


Max 


Min 


Max 


Max 


Min 


Max Max 


Min 


Max 


Min 


Max 


Max 


6 








698 : 


370 





897 : 


'.:'%$&:■ 





1121 570 





1645 


850 





2267 


1170 




2 


53 


425 :; 


••••285'--'- 


63 


543 > 


370 


75 


675 wimd 


103 


982 


650 


138 


1346 


890 




4 


79 


419 


279 


93 


536 


362 


110 


668 ^m§>m 


147 


975 


640 


191 


1338 


880 




6 


93 


413 ; 


' 273' 


110 


530 


." 354 


128 


661 435 


171 


967 


630 


219 


1330 


870 


8 








780 i; 


415 





1006 \ 


•537 





1261 660 





1858 


970 ' 





2571 


1320 




2 


50 


483 I 


322 


60 


619 I 


418 


71 


770 mmm 


98 


1124 


iSlliil 


130 


1543 


1020 




5 


83 


473 : 


313 


99 


607 : 


407 


115 


758 503 


154 


1110 


11111 


199 


1528 


1010 




8 


99 


463 ; 


303 


117 


596 I 


3% 


137 


746 490 


180 


1097 


llllli 


231 


1514 


1000 


10 








847 I 


450 





1096 I 


585 





1377 : 720 





2036 


1060 





2825 


1450 




2 


48 


533 \ 


'. v .3Biv 


57- 


684 


' 457 ' 


68 


852 r 560 - 


93 


1244 


850 


124 


1713 


1130 




5 


81 


522 ; 


346 


95 


671 


446 


112 


839 mmmm 


149 


1229 


829 


192 


1696 


1 105 




10 


104 


504 I 


330 


122 


651 \ 


|12|| 


142 


817 |fllll 


187 


1204 


795 


238 


1669 


1080 


15 








970 


■525 





1263 i 


wm:^ 





1596 immm. 





2380 


1240 





3323 


1720 




2 


4.5 


633 


414 


53 


815 


V'544^-- 


63 


1019 675 


86 


1495 


985 


114 


2062 


1350 




5 


76 


620 \ 


403 


90 


800 


529 


105 


1003 660 


140 


1476 


%7 


182 


2041 


1327 




10 


99 


600 \ 


386 


116 


777 


507 


135 


977 635 


177 


1446 


936 


227 


2009 


1289 




15 


115 


580 : 


m 


134 


755 ; 


491 


155 


953 610 


202 


1418 


905 


257 


1976 


1250 


20 








1057 ; 


Hii^iS 





1384 : 


;: : i|ff 





1756 : 930 





2637 


1111111 





3701 


190O 




2 


41 


711 i 


470 


50 


917 


612 


59 


1150 M^mm 


81 


1694 


1100 


107 


2343 


1520 




5 


73 


697 ; 


460 


86 


902 


599 


101 


1133 738 


135 


1674 


1079 


1.74 


2320 


1498 




10 


95 


675 \ 


443 


112 


S77 


576. 


130 


1105 710 


172 


1641 


1.045- 


220 


2282 


iliiiill 




15 


111 


654 


427 


129 


853 


557 


150 


1078 688 


195 


1609 


1018 


248 


2245 


1425 




20 


125 


634 


410 


145 


830 


::;5J7 


167 


1052 665 


217 


1578 


990 


273 


2210 


1390 


30 








1173 ! 


't^m 





1548 


■m>' 





1977 1060 





3004 


itBli 





4252 


2170 




2 


33 


826 : 


: ^$m: 


42 


1072 


700 


54 


1351 865 


74 


2004 


1310 


98 


2786 


1800 




5 


69 


811 


524 


82 


1055 


688 


96 


1332 851 


127 


1981 


1289 


164 


2759 


1775 




10 


91 


788 


507 


107 


1028 


668 


125 


1301 829 


164 


1944 


■ 1254 


209 


2716 


1733 




15 


105 


765 


490 


124 


1002 


648 


143 


1272 807 


187 


1908 


Biiii 


237 


2674 


1692 




20 


119 


743 


.473 


139 


977 


628 


160 


1243 ; 784 


207 


1873 


1185 


260 


2633 


iBiiii 




30 


149 


702 


444. 


171 


929 


■::M- 


195 


1189 lip! 


246 


1807 


1130 


305 


2555 


1585 


50 








1297 


708 





1730 


y: 952: 





2231 1195 





3441 


1825 





4934 


2550 




2 


26 


975 


615 


33 


1276 


813 


41 


1620 1010 


66 


2431 


1513 


86 


3409 


2125 




5 


65 


960 


605 


77 


1259 


798 


90 


1600 996 


118 


2406 


1495 


151 


3380 


2102 




10 


86 


935 


589 


101 


1230 


• '773 


118 


1567 iiiii 


154 


2366 


1466 


196 


3332 


llllli 




15 


100 


911 


. 572 


117 


1203 


747. 


136 


1536 948 


177 


2327 


1437 


222 


3285 


2026 




20 


113 


888 


556 


131 


1176 


••'722 


151 


1505 924 


195 


2288 


illili 


244 


3239 


1987 




30 


141 


844 


522 


161 


1125 


111! 


183 


1446 876 


; 232 


2214 


1349 


287 


3150 


1910 


100 








1411 


770 





1908 


1040 





2491 1310 





3925 


2050 





5729 


2950 




2 


21 


1155 


700 


? 25 


1536 


:^935: 


30 


1975 1170 


44 


3027 


1820 


72 


4313 


2550 




5 


60 


1141 


692 


71 


1519 


■926 


82 


1955 ,1159- 


! 107 


3002 


1803 


136 


4282 


253T- 




10 


80 


1118 


679 


94 


1492 


910 


108 


1923 1142 


142 


2961 


Bliilii 


180 


4231 


2500 




15 


93 


1095 


666 


109 


1465 


.895 


126 


1892 1124 


I 163 


2920 


1747 


; 206 


4182 


2469 




20 


105 


1073 


653 


122 


1438 


880 


141 


1861 1107 


| 181 


2880 


1719 


i 226 


4133 


2438 




30 


131 


1029 


. .627 


149 


1387 


wmm 


170 


1802 1071 


215 


2803 


3663 


j 265 


4037 


llllli 




50 


197 


944 


. 575 


; 217 


1288 


7B7 


241 


1688 1000 


J 292 


2657 


1550 


j 350 


3856 


2250 



For SI units, 1 in. - 25.4 mm, 1 ft. = 0.305 m, 1,000 Btu/hr = 0.293 kW, 1 in.~ = 645 mm". 



74 



WATER HEATERS 



Table 5-8 continued 



Table 5-8 

Type B Double-Wall Gas Vent [NFPA 54: Table 13.1(a)] (continued) 















Number of Appl 


ances: 


Single 


Appliance Type: 


Category 1 


Appliance Vent Connection: 


Connected Directly to Vent 














Vent Diameter - D(in 


■) 












16 


18 


20 


22 


24 










Appliance Input Rating in Thousands of Btu 


per Hour 








Height 
H 
(ft) 


Lateral 
L 
(ft) 


FAN 


NAT 


FAN 


NAT 


FAN 


NAT 


FAN 


NAT 


FAN 


NAT 


Min 


Max 


Max 


Min 


Max 


Max 


Min 


Max 


llllil 


Min 


Max 


Max 


Min 


Max 


Max 


6 








2983 


1530 





3802 


1960 





4721 


2430 





5737 


2950 





6853 


liiiiii! 




2 


178 


1769 


1 170 


225 


2250 


1480 


296 


2782 


1850 


360 


3377 


lllllli 


426 


4030 


2670 




4 


242 


1761 


1160 ! 


300 


2242 


1475 


390 


2774 


1835 


469 


3370 


lllllli 


555 


4023 


2660 




6 


276 


1753 


mo | 


341 


2235 


1470 


437 


2767 


1820 


523 


3363 


l|||||; 


618 


4017 


2630 


8 








3399 


111IS 





4333 


2220 





5387 


lHUll 





6555 


3360 





7838 


4010 




2 


168 


2030 


1340 


212 


2584 


1700 


278 


3196 


2110 


336 


3882 


2560 


401 


4634 


3050 




5 


251 


2013 


1330 


311 


2563 


1685 


398 


3180 


2090 


476 


3863 


2545 


562 


4612 


3040 




8 


289 


2000 


1320 


354 


2552 


1670 


450 


3163 


11111:1 


537 


3850 


2330 


630 


4602 


3030 


10 








3742 


1925 





4782 


2450 





5955 


3050 





7254 


3710 





8682 


wmmm. 




2 


161 


2256 


1480 


202 


2868 


1890 


264 


3556 


2340 


319 


4322 


2840 


378 


5153 


3390 




5 


243 


2238 


1461 


300 


2849 


1871 


382 


3536 


2318 


458 


4301 


2818 


540 


5132 


3371 




10 


298 


2209 


1430 


364 


2818 


1840 


459 


3504 


llllil 


546 


4268 


2780 


641 


5099 


3340 


15 








4423 


2270 





5678 


2900 





7099 


lillli 





8665 


.4410 





10,393 


11111111 




2 


147 


2719 


1770 


186 


3467 


2260 


239 


4304 


2800 


290 


■5232 


.3410 


346 


6251 


4080 




5 


229 


2696 


1748 


283 


3442 


H29S8 


355 


4278 


2777 


426 


5204 


3385 


501 


6222 


4057 . 




10 


283 


2659 


1712 


346 


3402 


21.93 


432 


4234 


1111111 


510 


5159 


3343 


599 


6175 


4019 ; 




15 


318 


2623 


1675 


385 


3363 


2150 


479 


4192 


2700 


564 


5115 


3300 


665 


6129 


3980 


20 








494.8 


iilill 





6376 


BmMi 





7988 


4060 





9785 


4980 





11,753 


6000 




2 


139 


3097 


2000 


175 


3955 


12570:! 


220 


4916 


llllitl 


269 


5983 


391.0. 


321 


7154 


4700 




5 


219 


3071 


\m 


270 


3926 


■2544 


337 


4885 


3174 


403 


5950 


■llii 


475 


7119 


lllllllll 




10 


273 


3029 


1940 


334 


3880 


2500 


413 


4835 


3130 


489 


5896 


iiHil 


573 


7063 


4600 




15 


306 


2988 


1910 


372 


3835 


f;2465l 


459 


4786 


3090 


541 


5844 


3795 


631 


7007 


liiiiii 




20 


335 


2948 


lilli 


404 


3791 


2430 


495 


4737 


3050 


585 


5792 


3760 


689 


6953 


4550 


30 








5725 


2920 





7420 


3770 





9341 


lillli 





11,483 


5850 





13,848 


7060 




2 


127 


3696 


■m 


159 


4734 


3050 


199 


5900 


3810 


241 


7194 


4650 


285 


8617 


5600 




5 


206 


3666 


iSlii 


252 


4701 


3020 


312 


5863 


Sliiill 


373 


7155 


4622 


439 


8574 


lliilill 




10 


259 


3617 


2300 


316 


4647 


2970 


386 


5803 


3739 


456 


7090 


4574 


535 


8505 


liiiiii: 




15 


292 


3570 


lllllt 


354 


4594 


2920 


431 


5744 


3695 


507 


7026 


llllil;: 


590 


8437 


lllill! 




20 


319 


3523 


2200 


384 


4542 


2870 


467 


5686 


liiiiii 


548 


6964 


4480 


639 


8370 


llliliffl 




30 


369 


3433 


2130 


440 


4442 


2785 


540 


5574 


3565 


635 


6842 


■ 4375 


739 


8239 


5225 


50 








6711 


imii 





8774 


4460 





11,129 


. 5635. 





13,767 


mm 





16,694 


8430 




2 


113 


4554 


2840 


141 


5864 


3670 


171 


7339 


4630 


209 


8980 


5695 


251 


10,788 


6860 




5 


191 


4520 


2813 


234 


5826 


3639 


283 


7295 


■III 


336 


8933 


:5654 


394 


10,737 


.6818 




10 


243 


4464 


2767 


295 


5763 


urns 


355 


7224 


llllil 


419 


8855 


5585 


491 


10,652 


6749 




15 


274 


4409 


2721 


330 


5701 


'•••:3534/- 


396 


7155 


4511 


465 


8779 


5546 


542 


10,570 


6710 




20 


300 


4356 


2675 


361 


5641 


3481 


433 


7086 


4479 


506 


8704 


5506 


586 


10,488 


6670 




30 


347 


4253 


l!Bil 


412^ 


~" 5523 


3431, 


494 


6953 


lllllli 


577 


8557 


jlllll 


672 


10,328 


6603 


100 








7914 


4050 





10,485 


5300 





13,454 


6700 





16,817 


8600 





20,578 


10,300 




2 


95 


5834 


3500 


120 


7591 


4600 


138 


9577 


5800 


169 


11,803 


iliiilss 


204 


14,264 


8800 




5 


172 


5797 


3475 


208 


7548 


4566 


245 


9528 


wrm 


293 


11,748 


7162 


341 


14,204 


lllliil 




10 


223 


5737 


3434 


268 


7478 


4509 


318 


9447 


5717 


374 


11,658 


7100 


436 


14,105 


lllllli 




15 


252 


5678 


3392 


304 


7409 


"i"T J I 


358 


9367 


5665 


418 


11,569 


7037 


487 


14,007 


8610 




20 


277 


5619 


3351 


330 


7341 


4394 


387 


9289 


5613 


452 


11,482 


6975 


523 


13,910 


8537 




30 


319 


5505 


lillli 


378 


7209 


4279 


446 


9136 


5509 


514 


11,310 


6850 


592 


13,720 


8391 




50 


415 


5289 


iilllli 


486 


6956 


4050 


572 


8841 


5300 


659 


10,979 


6606 


752 


13,354 


8100 



For SI units, 1 in. = 25.4 mm, 1 ft. - 0.305 m, 1,000 Btu/hr = 0.293 kW, 1 in. 2 - 645 mm 2 . 



75 



Table 5-9 



UNIFORM PLUMBING CODE 



Table 5-9 

Type B Double-Wall Gas Vent [NFPA 54: Table 13.1(b)] 









Number of Appliances: 


Single 








Appliance 


Type: 


Category 1 


Appliance Vent Connection: 


Single-Wall Metal Connector 












Vent Diameter 


-D(in. 


) 












3 


4 


5 


6 


7 








Appliance Input Rating in Thousands of Btu 


per Hour 








Height 
H 
(ft) 


Lateral 

L 
(ft) 


FAN 


NAT 


FAN 


NAT 


FAN 


NAT 


FAN 


NAT 


FAN 


NAT 


Min 


Max 


Max 


Min 


Max 


Max 


Min 


Max 


Max 


Min 


Max 


Max 


Min 


Max 


Max 


6 





38 


77 


:.'■.: -45:'. 


59 


151 


:••'; ?:$$ = • 


85 


249 


140 


126 


373 


204 


165 


522 


iinii 




2 


39 


51 


36 


60 


96 


66 


85 


156 


104 


123 


231 


156 


159 


320 


213 




4 


NA 


NA 


mm& 


74 


92 


63 


102 


152 


102 


146 


225 


132 


187 


313 


208 




6 


NA 


NA 


31 


83 


89 


■60 


114 


147 ! 


SiSi 


163 


220 


148 


207 


307 


203 


8 





37 


83 


mm& 


58 


164 


m^mt 


83 


273 i 


: : :.;154;-. 


123 


412 


iiiiii 


161 


580 


319 




2 


39 


56 


39 


59 


108 


w$wm 


83 


176 \ 


119 


121 


261 


179 


155 


363 


246- 




5 


NA 


NA 


37 


77 


102 


69 


107 


168 ! 


114 


151 


252 


171 


193 


352 


■Bill 




8 


NA 


NA 


• .33 


90 


95 


...64 


122 


161 


:m?:;: : 


175 


243 


163 


223 


342 


225 


10 





37 


87 


tmrn 


57 


174 


;-- : .' : ." :: -W : .\ 


82 


293 ; 


mmm 


120 


444 


254 


158 


628 


."344 




2 


39 


61 


41 


59 


117 


80 


82 


193 ! 


1.28 


119 


287 


194 


153 


400 


iiiiii 




5 


52 


56 


39 


76 


111 


76 


105 


185 ! 


122 


148 


277 


186 


190 


388 


261 




10 


NA 


NA 


34 • 


97 


100 


6$ 


132 


171 j 


112 


188 


261 


1111111 


237 


369 


241 


15 





36 


93 


>r ■{&$■■ -r 


56 


190 


' I'll: 


80 


325 : 


186 


116 


499 


iiiiii 


153 


713 


388 




2 


38 


69 


47 ■ 


57 


136 


93 


80 


225 j 


149 


115 


337 


iilll 


148 


473 


314 




5 


51 


63 


44; 


75 


128 


m 


102 


216 i 


140 


144 


326 


217 


182 


459 


298 




10 


NA 


NA 


39 


95 


116 


;y-"W 


128 


201 ! 


131 


182 


308 


203 


228 


438 


284 




15 


NA 


NA 


NA 


NA 


NA 


72 


158 


186 j 


124 


220 


290 


192 


272 


418 


269 


20 





35 


96 


60 


54 


200 


118 


78 


346 ; 


201 


114 


537 


306 


149 


772 


428 




2 


37 


74 


50 


56 


148 


. 99... 


78 


248 i 


165 


113 


375 


248 


144 


528 


iisii 




5 


50 


68 


mm 


73 


140 


■ 94 


100 


239 ! 


1.58 


141 


363 


239 


178 


514 


334 




10 


NA 


NA 


§mm 


93 


129 


86 


125 


223 i 


146.. 


177 


344 


224 


222 


491 


316 




15 


NA 


NA 


ymm^ 


NA 


NA 


m 


155 


208 | 


136 


216 


325 


210 


264 


469 


301 




20 


NA 


NA 


ymm 


NA 


NA 


mmm:. 


186 


192 ; 


126 


254 


306 


1% 


309 


448 


iiiiii 


30 





34 


99 


fmm^ 


53 


211 


.127 . 


76 


372 • 


219 


110 


584 


334 


144 


84.9 


472 




2 


37 


80 


5f> 


55 


164 


Ill 


76 


281 


183 


109 


429 


279 


139 


610 


392 




5 


49 


74 


• -52 


72 


157 


106 


98 


271 : 


ii»! 


136 


417 


271 


171 


595 


382 




10 


NA 


NA 


vmm 


91 


144 


m§m 


122 


255 


168 


171 


397 


iiiii 


213 


570 


367' 




15 


NA 


NA 


mmm 


115 


131 


••NA- 


151 


239 


■157 . 


208 


377 


242 


255 


547 


349 




20 


NA 


NA 


i$$SS 


NA 


NA 


:-mm 


181 


223 


mm$ 


246 


357 


iliilll 


298 


524 


333 




30 


NA 


NA 


wmm- 


NA 


NA 


PMK 


NA 


NA 


NA 


NA 


NA 


NA 


389 


477 


305 


50 





33 


99 


m 


51 


213 


■'■>-&m? 


73 


394 


'"W'" 


105 


629 


361 


138 


928 


■ill 




2 


36 


84 


61 


53 


181 


121 


73 


318 


■205 


104 


495 


312 


133 


712 


443 




5 


48 


80 


SKI 


70 


174 


117 


94 


308 


198 


131 


482 


305 


164 


696 


435 




10 


NA 


NA 


NA 


89 


160 


snn 


118 


292 


186 


162 


461 


292 


203 


671 


420 




15 


NA 


NA 


NA 


112 


148 


i Mmmm 


145 


275 


174 


199 


441 


280 


244 


646 


405 




20 


NA 


NA 


mm*: 


NA 


NA 


ilili 


176 


257 


mm 


236 


420 


illlll 


285 


622 


369 




30 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


315 


376 


NA 


373 


573 


NA 


100 





NA 


NA 


mm; 


49 


214 


mmm 


69 


403 


wm& 


100 


659 


395 


131 


991 


555 




2 


NA 


NA 


NA 


51 


192 


wmmM 


70 


351 


iiwi 


98 


563 


373 


125 


828 


mn 




5 


NA 


NA 


■:NA • 


67 


186 


...■■•.MA ' 


90 


342 


.-NA 


125 


551 


366 


156 


813 


m 




10 


NA 


NA 


■-NA. 


85 


175 


IMS 


113 


324 


wmm. 


153 


532 


354 


191 


789 


486 




15 


NA 


NA 


NA 


132 


162 


^Sm 


138 


310 


NA 


188 


511 


343 


230 


764 


473 




20 


NA 


NA 


NA 


NA 


NA 


WWK 


168 


295 


NA 


224 


487 


NA 


270 


739 


458 




30 


NA 


NA 


NA 


NA 


NA 


■NA. 


231 


264 


NA 


301 


448 


NA 


355 


685 


■111 




50 


NA 


NA 


NA 


NA 


NA 


litis 


NA 


NA 


NA 


NA 


NA 


NA 


540 


584 


wmm 



For SI units, 1 in. = 25.4 mm, 1 ft. = 0.305 m, 1,000 Btu/hr = 0.293 kW, 1 in. 2 = 645 mm 2 . 



76 



WATER HEATERS 



Table 5-9 continued 



Table 5-9 

Type B Double-Wall Gas Vent [NFPA 54: Table 13.1(b)] (continued) 





Number of Appliances: 


Single 


Appliance Type: 


Category 1 


Appliance Vent Connection: 


Single-Wall Metal Connector 


Vent Diameter - (in.) 


8 


9 


10 


12 






Appliance Input Rating in Thousands of Btu 


per Hour 






Height 
H 
(ft) 


Lateral 

L 
(ft) 


FAN 


NAT 


FAN NAT 


FAN 


NAT 


FAN 


NAT 


Min 


Max 


Max 


Min 


Max Max 


Min 


Max 


Max 


Min 


Max 


Max 


6 





211 


695 | 


. 369 


267 


894 469 


371 


1118 


569 


537 


1639 


84M 




2 


201 


423 1 


284 


251 


541 ; 368 


347 


673 1 


453 


498 


979 


648 




4 


237 


416 f 


\.--:zm: 


295 


533 360 


409 


664 


443. 


584 


971 


638 




6 


263 


409 | 


I:,;; : : 27l; : : 


327 


526 imMmi 


449 


656 : 


S!$tli 


638 


962 


627 


8 





206 


777 I 


::;rMA\ 


258 


1002 536 


360 


1257 | 


;.:.::::658.:; 


521 


1852 


967 




2 


197 


482 i 


321 


246 


617 417 


339 


768 ■; 


--...■■■■SB--- 


486 


1120 


743 




5 


245 


470 !, 


311 


305 


604 404 


418 


754 \ 


500 


598 


1104 


730 




8 


280 


458 I 


$00 


344 


591 w§mmg 


470 


740 ; 


486 


665 


1089 


1057 


10 





202 


844 I 


r^im 


253 


1093 mgmm 


351 


1373 I 


: .'-m%s. 


507 


2031 




2 


193 


531 I: 


354 


242 


681 456 


332 


849 I 


559 


475 


1242 


848 




5 


241 


518 ! 


344 


299 


667 wmim§ 


409 


834 ; 


...544.. 


584 


1224 


lililii 




10 


296 


497 | 


;;:-;J|p:; 


363 


643 fggtlg 


492 


808 i 


520 


688 


1194 


Sllllllil 


15 





195 


966 \; 


);8i»ft 


244 


1259 681 


336 


1591 


^mmB 


488 


2374 


lliiill 




2 


187 


631 ; 


413 


232 


812 mmim 


319 


1015 : 


673 


4.57 


1491 


983 




5 


231 


616 ;; 


400 


287 


795 wmm 


392 


997 I 


wmm 


562 


1469 


963 




10 


284 


592 ii; 


381 


34.9 


768 501. 


470 


966 


628 


664 


1433 


92$ 




15 


334 


568 i 


367 


404 


742 484 


540 


937 | 


601 


750 


1399 


894 


20 





190 


1053 I 


•••,,;:;::573 : : , 


238 


1379 750 


326 


1751 I 


927 


473 


2631 


1346 




2 


182 


708 | 


468 


227 


914 611 


309 


1146 


... m ,.. 


443 


1689 


1098 




5 


224 


692 i 


457 


279 


896 596. 


381 


.1126 


wmm 


547 


1665 


1074 




10 


277 


666 1 


437 


339 


866 570 


457 


1092 


702 


646 


1626 


KB7 




15 


325 


640 ;: 


419 


393 


838 .549 


526 


1060 


677 


730 


1587 


1005 




20 


374 


616 \ 


400 


448 


810 IPHgii 


592 


1028 i 


651 


808 


1550 


■■■I 


30 





184 


1168 I 


647 


229 


1542 wmmm. 


312 


1971 i 


1056 


454 


2996 


liiiilli 




2 


175 


823 | 


•■ -m- 


219 


1069 698 


296 


1346 


863 


424 


1999 


■1308 




£> 


215 


806 l 


521 


269 


1049 684 


366 


1324 ; 


846 


524 


1971 


1283 




10 


265 


777 I 


501 


327 


1017 662 


440 


1287 \ 


■821- 


620 


1927 


1243 




15 


312 


750 I 


481 


379 


985 638 


507 


1251 | 


794 


702 


1884 


1205 




20 


360 


723 I 


461 


433 


955 615 


570 


1216 ) 


768 


780 


1841 


1166 




30 


461 


670 | 


426 


541 


895 574 


704 


1147 1 


720 


937 


1759 


1101 


50 





176 


1292 I 


^m^ 


220 


1724 IISIB 


295 


2223 i 


1189 


428 


3432 


1818 




2 


168 


971 i 


613 


209 


1273 ;. 811 


280 


1615 


1007 


401 


2426 


1509 




D 


204 


953 :; 


■ 602.. 


257 


1252 fiitiii 


347 


1591 


991 


496 


2396 


1490 




10 


253 


923 i 


5&3 


313 


1217 lllpi:::! 


418 


1551 i 


963 


589 


2347 


1455 




15 


299 


894 1 


....:562... 


363 


1183 llllaif 


481 


1512 I 


.••■■• 934- 


668 


2299 


1421 




20 


345 


866 ; 


543 


415 


1150 70S 


544 


1473 I 


906 


741 


2251 


1387 




30 


442 


809 :; 


502 


521 


1086 649 


674 


1399 I 


848 


892 


2159 


1338 


100 





166 


1404 I 


■ :: -:~w-. 


207 


1900 ; 1033 


273 


2479 I 


1300 


395 


3912 


2042 




2 


158 


1152 . 


698 


196 


1532 agilfc 


259 


1970 


1168 


371 


3021 


1817 




D 


194 


1134 ! 


688 


240 


1511 ; 921 


322 


1945 ! 


1153 


460 


2990 ; 


1796 




10 


238 


1104 ! 


672 


293 


1477 902 


389 


1905 I 


1133 


547 


2938 : 


1763 




15 


281 


1075 ; 


656 


342 


1443 884 


447 


1865 : 


1110 


618 


2888 


1730 




20 


325 


1046 I 


639 


391 


1410 ; 864 


507 


1825 


1087 


690 


2838 


1696 




30 


418 


988 | 


wmm 


491 


1343 iilelt 


631 


1747 


1041 


834 


2739 


1627 




50 


617 


866 I; 


\ : -fHM 


711 


1205 mmMM 


895 


1591 : 


NA 


1138 


2547 


. 1.489 



For SI units, 1 in. - 25.4 mm, 1 ft. = 0.305 m, 1,000 Btu /hr = 0.293 kW, 1 in. 2 = 645 mm 2 . 



77 



Table 5-10 



UNIFORM PLUMBING CODE 



Table 5-10 

Masonry Chimney [NFPA 54-09: Table 13.1(c)] 











Number of Appliances: 


Single 


Appliance Type: 


Category 1 


Appliance Vent Connection: 


Type B Double-Wall Connector 


Type B Double-Wall Connector Diameter - 0(in.) 
To be used with chimney areas within the size limits at bottom 




3 




4 


5 


6 


7 


Appliance Input Rating in Thousands of Btu per Hour 


Height 
H 
(ft) 


Lateral 

L 
(ft) 


FAN 


NAT 


FAN NAT 


FAN NAT 


FAN NAT 


FAN 


NAT 


Min 


Max 


Max 


Min 


Max Max 


Min 


Max Max 


Min 


Max Max 


Min 


Max 


Max 


6 


2 


NA 


na : 


....:. 28. 


NA 


NA WIMi 


NA 


NA 86 


NA 


NA 130 


NA 


NA 


180 




5 


NA 


NA 


25 


NA 


NA . .49 


NA 


NA : 82 


NA 


NA 117 


NA 


NA 


165 


8 


2 


NA 


NA 


;,," : 29'v : :: 


NA 


na f;il§i 


NA 


NA ^ 93 


NA 


NA -145 


NA 


NA 


198 




5 


NA 


NA 


26 


NA 


NA :§Mi:: 


NA 


na ; m 


NA 


NA 134 - 


NA 


NA 


183 




8 


NA 


NA 


liPI 


NA 


NA " -48 


NA 


NA I|ffl| : 


NA 


' NA : 127 


NA 


NA 


175- 


10 


2 


NA 


NA 


: 31 • 


NA 


NA 61 


NA 


NA 103 


NA 


NA 162 


NA 


NA 


:.221 •• 




5 


NA 


NA 


28 


NA 


na m^mi 


NA 


NA " % 


NA 


NA 148 


NA 


NA 


204 




10 


NA 


NA 


■ 25" 


NA 


na ii:g§: : 


NA 


NA 87 


NA 


NA 139 


NA 


NA 


191 


15 


2 


NA 


NA 


.■ 35 


NA 


na mm:B 


NA 


NA " 114 


NA 


NA 179 


53 


475 


250 




5 


NA 


NA 


3B 


NA 


NA . 62 


NA 


NA 107 


NA 


NA 164 


NA 


NA 


231 




10 


NA 


NA 


2$ 


NA 


NA iil5i 


NA 


NA '■ 97 


NA 


NA .153 


NA 


NA 


216 




15 


NA 


NA 


NA 


NA 


NA 48 


NA 


NA . 89 


NA 


NA 141 


NA 


NA 


.201 


20 


2 


NA 


NA 


38 


NA 


na wmm 


NA 


NA .1.24 


NA 


NA : 201 


51 


522 


' : 274-.: 




5 


NA 


NA 


iiiiii? 


NA 


NA ■ 68 


NA 


NA 116 


NA 


NA . 184 


80 


503 


•;-;v : 254 : : 




10 


NA 


NA 


NA 


NA 


NA 60 


NA 


NA r 107 


NA 


na mm& 


NA 


NA 


237 




15 


NA 


NA 


:;ink 


NA 


na :iiii; 


NA 


NA : 97 


NA 


NA 159 


NA 


NA 


220 




20 


NA 


NA 


■•■■NA-'- 


NA 


NA ||||§§ 


NA 


na |I:I|: 


NA 


NA ■ 148 


NA 


NA 


206 


30 


2 


NA 


NA 


•:■ & 


NA 


NA 82 


NA 


NA 137 


NA 


NA 216 


47 


581 


303 




5 


NA 


NA 


imm^ 


NA 


NA Kfi>: 


NA 


NA 128 


NA 


NA 198 


75 


561 


281 




10 


NA 


NA 


' na: 


NA 


NA ailM:;::: 


NA 


NA ■ 1.15 


I NA 


NA : 184 


NA 


NA 


mmm- 




15 


NA 


NA 


■na': 


NA 


NA IgUfe 


NA 


NA 107 


; NA 


NA 171 


NA 


NA 


. - 243'::- 




20 


NA 


NA 


Wmm. 


NA 


na ^mm 


NA 


NA 91 


; NA 


NA ■ 159 -| NA 


NA 


227 




30 


NA 


NA 


• NA 


NA 


NA |ili|i 


NA 


na wmm 


! NA 


NA j NA | NA 


NA 


188 


50 


2 


NA 


NA 


wmm: 


NA 


na wmm 


NA 


NA 161 


•: NA 


NA ; 251 -j NA 


NA 


351. 




5 


NA 


NA 


.-.NA:. 


NA 


na w$m& 


NA 


NA 151 


: NA 


NA 230 


NA 


NA 


323- 




10 


NA 


NA 


EMM 


NA 


na : mm^ 


NA 


NA 138 


:! NA 


NA 215 


NA 


NA 


304 




15 


NA 


NA 


NA 


NA 


na wmmM 


j NA 


NA 127. 


\ NA 


NA 199 


NA 


NA 


. 282 




20 


NA 


NA 


NA 


NA 


na pm§ 


NA 


na mm 


; NA 


NA ■ 1.85 


NA 


NA 


264 




30 


NA 


NA 


NA 


NA 


NA SMB 


na na iiiii 


I NA 


na mm 


NA 


NA 


' NA 


Mi 


nimum 


















i 


nternal 


















cl 


area of 

limney 

(in. 2 ) 




12 




19. Illll 


28 Illll 


38 ||:||| 


50 




Ma 


ximum 












i 


nternal 












d 


area of 
tiitnnev 


Seve 


n times the listt 


id appliance categorized vent area, flue collar area, or draft hood outlet areas. 






(in. 2 ') 













For SI units, 1 in. = 25.4 mm, 1 ft. = 0.305 m, 1,000 Btu/hr = 0.293 kW, 1 in." = 645 mm" 



78 



WATER HEATERS 



Table 5-10 continued 



Table 5-10 

Masonry Chimney [NFPA 54-09: Table 13.1(c)] (continued) 







Number of Appliances: 


Single 


Appliance Type: 


Category 1 


Appliance Vent Connection: 


Type B Double-Wall Connector 






Type B Double-Wall Connector Diameter 


-D(in.) 
















To be used with chimney areas 


within the size limits at bottom 






8 


9 


10 


12 


Appliance Input Rating in Thousands of Btu per Hour 


Height 
H 

(ft) 


Lateral 

L 
(ft) 


FAN 


NAT 


FAN NAT 


FAN 


NAT 


FAN 


NAT 


Min 


Max 


Max 


Min 


Max Max 


Min 


Max 


Max 


Min 


Max 


Max 


6 


2 


NA 


NA ! 


247 


NA 


NA 320 


NA 


NA 


401 


NA 


NA ! 


581 




5 


NA 


NA : 


231 


NA 


NA ' 298 


NA 


NA 


376 


NA 


NA | 


561 


8 


2 


NA 


NA : 


msm& 


84 


590 350 


100 


728 


446 


139 


1024 ; 


• ; 65r*.* 




5 


NA 


NA 


mMm& 


NA 


NA M^MMM 


149 


711 


423 


201 


1007 •: 


640 




8 


NA 


NA 


; , : :;':i2i;: 


NA 


NA 318 


173 


695 


mmm 


231 


990 I 


■623 


10 


2 


68 


519 


W:mm§ 


82 


655 wmmm 


98 


810 


491 


136 


1144 1 


724 




5 


NA 


NA 


wzmzm 


1.24 


638 JEiiiMk!; 


146 


791 


466 


196 


1124 


712 




10 


NA 


NA 


263 


155 


610 III341I 


182 


762 


444 


240 


1093 


668 


15 


2 


64 


613 


336 


77 


779 PlEilff; 


92 


968 


562 


127 


1376 


841 




5 


99 


594 


-313. 


118 


759 :■■ 416 


139 


946 


533 


186 


1352 ; 


828 




10 


126 


565 


296 


148 


727 394-- 


173 


912 


.- : .-567-; 


229 


1315 


■::■.. m 




15 


NA 


NA 


281 


171 


698 gilSli 


198 


880 


• ••••485 


259 


1280 : 


742 


20 


2 


61 


678 


: --;;.:-^-- 


73 


867 llllilt: 


87 


1083 


' 627 


121 


1548 


953 




5 


95 


658 


■ ■ 350" . 


113 


845 %gmm 


133 


1059 


■■ 597 


179 


1523 


933 




10 


122 


627 


332 


143 


811 440 


167 


1022 


566 


221 


1.482 


879 




15 


NA 


NA 


.314 


165 


780 418 


191 


987 


541 


251 


1443 


mo 




20 


NA 


NA 


296 


186 


750 wmm 


214 


955 


513 


277 


1406 


807 


30 


2 


57 


762 


wmzm 


68 


985 558 


81 


1240 


••■ '. ";M7- ■'■• 


111 


1793 i 


1112 




5 


90 


741 


393 


106 


962 w§mm 


125 


1216 


683 


169 


1766 : 


1094 




10 


115 


709 


373 


135 


927 . 560 


158 


1176 


zmmm 


210 


1721 \ 


1025 




15 


NA 


NA 


■ 353 


156 


893 476 


181 


1139 


621 


239 


1679 ! 


981 




20 


NA 


NA 


:... : . : :;332:- : ; 


176 


860 450 


203 


1103 


592 


264 


1638 i 


940 




30 


NA 


NA 


tllilS 


NA 


NA 416 


249 


1035 


•:•• -55$ ;: 


318 


1560 i 


tispi 


50 


2 


51 


840 


477 


61 


1106 633 


72 


1413 


?&mm 


99 


2080 ! 


mm$^. 




5 


83 


819 


445 


98 


1083 596 


116 


1387 


?mmm 


155 


2052 ; 


1225 




10 


NA 


NA 


424 


126 


1047 WiSSM 


147 


1347 


w$m% 


195 


2006 ! 


1147 




15 


NA 


NA 


400 


146 


loio WM^mB 


170 


1307 


702 


222 


1961 ! 


1099 




20 


NA 


NA 


376 


165 


977 : . ■ 511 ■ 


190 


1269 


669 


246 


1916 


1050 




30 


NA 


NA 


. .327 


NA 


NA = '46$ 


233 


1196 


iiiiii 


295 


1832 : 


MMm^ 


K 


4inimum 






















internal 






















area of 




63 




78 IS111 


95 






132 






chimney 






















(in. 2 ) 




















V 


laximum 




















internal 




















area of 
chimney 


Seven 1 


times the listed appliance categorized vent are 


?a, flue collar area, 


or draft 


lood out] 


et areas. 






(in. 2 ) 



















For SI units, 1 in. = 25.4 mm, 1 ft. = 0.305 m, 1,000 Btu/hr = 0.293 kW, 1 in. 2 = 645 mm 2 . 



79 



Table 5-1 1 



UNIFORM PLUMBING CODE 



Table 5-11 

Masonry Chimney [NFPA 54-09: Table 13.1(d)] 











Number of Appliances: 


Single 


Appliance Type: 


Category I 


Appliance Vent Connection: 


Single-Wall Metal Connector 


Single-Wall Metal Connector Diameter - D (in.) 
To be used with chimney areas within the size limits at bottom 


3 


4 


5 


6 


7 


Appliance Input Rating in Thousands of Btu per Hour 


Height 
H 
(ft) 


Lateral 

L 
(ft) 


FAN 


NAT 


FAN NAT 


FAN NAT 


FAN NAT 


FAN 


NAT 


Min 


Max 


Max 


Min 


Max Max 


Min 


Max Max 


Min 


Max Max 


Min 


Max 


Max 


6 


2 


NA 


NA 


28 


NA 


na m$& 


NA 


na mm$£. 


NA 


NA 130 


NA 


NA 


180 




5 


NA 


NA 


25 


NA 


NA liifj 


NA 


NA : 81 


NA 


NA 116 


NA 


NA 


164 


8 


2 


NA 


NA 


29 


NA 


na ;: : ;:il§i- 


NA 


na mmi: 


NA 


NA ■■ 145 


NA 


NA 


197 




5 


NA 


NA 


26 


NA 


NA ■ 51 i 


NA 


NA -87 


NA 


NA ' 133 . 


NA 


NA 


m$m 




8 


NA 


NA 


mmg 


NA 


na ;:|li|| 


NA 


NA ■ ■ 82 


NA 


NA 126 


NA 


NA 


- 174 


10 


2 


NA 


NA 


31 


NA 


NA . 61 


NA 


NA 102 


NA 


NA 161 


NA 


NA 


220 




5 


NA 


NA 


28. 


NA 


NA Bilii 


NA 


NA ' '95 


NA 


na w§mm 


NA 


NA 


203 




10 


NA 


NA 


mm : 


NA 


NA ■ ■ 49 


NA 


NA . . 86. 


NA 


NA ' 137 . 


NA 


NA 


189 


15 


2 


NA 


NA 


35 


NA 


NA jMM%. 


NA 


na ^mm^ 


NA 


NA 178 


166 


473 


wim::.:, 




5 


NA 


NA 


B$K 


NA 


NA 6\ 


NA 


NA 106 


NA 


NA : 163. ; 


NA 


NA 


. 230... 




10 


NA 


NA 


'■■■:.. 'it-/- 


NA 


NA 54 


NA 


NA ' M 


NA 


NA ■ 151 : 


NA 


NA 


214 




15 


NA 


NA 


} imM:i 


NA 


NA . 46 


NA 


NA |p|fc! 


NA 


na wm$ : M 


NA 


NA 


198 


20 


2 


NA 


NA 


38 


NA 


na wmm 


NA 


na wmm 


NA 


NA 200 


163 


520 


273 




5 


NA 


NA 


wm^ 


NA 


NA 67 


NA 


NA '115 


NA 


NA 1-83 ■ : 


NA 


NA 


• : 252' 




10 


NA 


NA 


NA 


NA 


NA 59 


NA 


NA ■ 105.. 


NA 


NA 170 


NA 


NA 


:::.23S- ; . 




15 


NA 


NA 


NA 


NA 


na ^mm^ 


NA 


NA Si»i 


NA 


NA ■■ 156 


NA 


NA 


saife ; : 




20 


NA 


NA 


NA 


NA 


na §ffi§ 


NA 


NA 80 


NA 


NA 144 


NA 


NA 


202 


30 


2 


NA 


NA 


41 


NA 


NA 81 


NA 


NA W$M 


NA 


na w : mm 


158 


578 


wm& 




5 


NA 


NA 


NA 


NA 


na wm& 


NA 


NA wmiEh 


"NA 


NA 196 


NA 


NA 


279 




10 


NA 


NA 


•NA- 


NA 


NA 66 


NA 


NA 11.3 


NA 


NA . 182 


NA 


NA 


260 




15 


NA 


NA 


NA 


NA 


na wmm 


NA 


NA ; 105 


NA 


NA 168 


NA 


NA 


240 




20 


NA 


NA 


NA ' 


NA 


na wmmi 


NA 


NA WMM 


NA 


na m^mB 


NA 


NA 


.223 




30 


NA 


NA 


ilfSSS 


NA 


na :t;i§ii ! 


NA 


NA ; NA 


; NA 


NA . NA 


NA 


NA 


182 


50 


2 


NA 


NA 


m$m 


NA 


na mm& 


NA 


NA 160 


NA 


na mmm; 


NA 


NA 


350 




5 


NA 


NA 


NA 


NA 


na wmm 


NA 


NA 149 


: NA 


na \imm 


NA 


NA 


321 




10 


NA 


NA 


NA 


NA 


na $mm* 


NA 


NA : 136 


: NA 


NA 21.2 


NA 


NA 


301 




15 


NA 


NA 


NA 


NA 


na wmm 


NA 


NA 124 


NA 


NA 195 


NA 


NA 


■ 278 




20 


NA 


NA 


NA 


NA 


na ?%mm 


: NA 


na ffiHKK 


. NA 


NA 180 


NA 


NA 


wmm 




30 


NA 


NA 


NA 


NA 


NA liil 


' NA 


NA . -NA 


! NA NA M.S§i 


NA 


NA 


■•NA- 


Mil 


limum 




















i 


nternal 










'. Wt'M';M 










cl 


area of 
limney 

(in- 2 ) 




12 




19 


28 llill 


38 Ifill 




50 




Ma 


ximum 
















i 


nternal 
















d 


area of 
limney 

(in. 2 ) 


Sevei 


n times the listt 


?d appliance categorized vent area, flue collar 


area, or draft hood outlet area 


s. 





For SI units, 1 in. = 25.4 mm, 1 ft. = 0.305 m, 1,000 Btu/hr = 0.293 kW, 1 in. 2 = 645 mm 2 . 



80 



WATER HEATERS 



Table 5-11 continued 



Table 5-11 

Masonry Chimney [NFPA 54-09: Table 13.1(d)] (continued) 







Number of Appliances: 


Single 


Appliance Type: 


Category 1 


Appliance Vent Connection: 


Single-Wall Metal Connector 






Single-Wall Metal Connector Diameter- D(in.) 
















To be used with chimney areas within the size limits at bottom 








8 


| 9 


10 


12 


Appliance input Rating in Thousands of Btu per Hour 


Height 


Lateral 


FAN 


NAT 


FAN NAT 


FAN NAT 


FAN 


NAT 


H 
(ft) 


L 
(ft) 


















Min 


Max 


Max 


Min 


Max Max 


Min 


Max Max 


Min 


Max 


Max 


6 


2 


NA 


na ; 


■ ■■■■■M?.:.. 


NA 


NA 319 


NA 


NA 400 


NA 


na ; 


580 




5 


NA 


NA ; 


230 


NA 


NA 297 


NA 


NA fHf|| 


NA 


NA \ 


"V:56Qv 


8 


2 


NA 


NA : 


"265 


NA 


NA ■ -349 ■ 


382 


725 : 0MM 


549 


1021 : 


650 




5 


NA 


NA ; 


246 


NA 


NA iiH 


NA 


NA 422 


673 


1003 I 


638 




8 


NA 


NA ; 


237. 


NA 


NA 3J7 


NA 


NA 408 


747 


985 } 


621. 


10 


2 


216 


518 ! 


.2.97 ■ 


271 


654 387 


373 


. 808 490 


536 


1142 


' 722 




5 


NA 


NA \ 


276 


334 


635 364 


459 


789 465 


657 


1121 


710 




10 


NA 


na ; 


261 


NA 


NA , '345 


547 


75S 441 


771 


1088 : 


665 


15 


2 


211 


611 ; 


"335 


264 


776 : 440 


362 


965 mmm. 


520 


1373 \ 


840 




5 


261 


591 : 


312 


325 


755 ■ -414 " 


444 


942 531 


637 


1348 ! 


■■■■825- 




10 


NA 


NA : 


294 


392 


722 : 392 


531 


907 504 


749 


1309 ! 


774 




15 


NA 


NA I 


278 


452 


692 mmm 


606 


873 481 


841 


1272 ; 


738 


20 


2 


206 


675 


374. 


258 


864 : 490 


252 


1079 625 


508 


1544 


950 




5 


255 


655 : 


348 


317 


842 ■■ m ■ 


433 


1055 594 


623 


1518 1 


930 




10 


312 


622 I 


330 


382 


806 437 


517 


1016 562 


733 


1.475 j 


mmMi 




15 


NA 


NA ! 


311 


442 


773 . 414- 


591 


979 539 


823 


1434 ! 


■ 835 1 




20 


NA 


NA 


■ 292 


NA 


NA i|tip| 


663 


944 510 


911 


1394 ; 


800 


30 


2 


200 


759 


426 


249 


982 : 556 


340 


1237 3SS|§^ 


489 


1.789 ! 


1110 




5 


245 


737 


391 


306 


958 Mmmm- 


417 . 


1210 680 


i 600 


1760 : 


1090 




10 


300 


703 


" 370 


370 


920 496 


500 


1168 644 


708 


1713 i 


1020 




15 


NA 


NA 


349 


428 


884 471 


572 


1128 * 615 


798 


1668 \ 


■975 




20- 


NA 


NA 


':--.=-32£: 


NA 


na $$mm 


643 


1089 rn^mM 


883 


1624 i 


932 




30 


NA 


NA 


281 


NA 


NA 408 


NA 


NA ' ■ 544 


1055 


1539 


865 


50 


2 


191 


837 


■475 


238 


1103 631 


323 


1408 810 


463 


2076 


1240 




5 


NA 


NA 


44.2 


293 


1078 593 


398 


1381 770 


571 


2044 i 


1220 




10 


NA 


NA 


4.20 


355 


1038 ilH» 


447 


1337 wwm 


674 


1994 


1140 




15 


NA 


NA 


: : V::-:=3#§.-: 


NA 


na m^^m 


546 


1294 695 


761 


1945 


1090 




20 


NA 


NA 


370 


NA 


NA 504 


616 


1251 660 


844 


1898 


1040 




30 


NA 


NA 


318 


NA 


NA 458 


NA 


NA 610 


1009 


1805 


970 


IS 


/finimum 




















internal 




















area of 




63 




78 isns 


95 MmM\ 




132 






chimney 




















(in. 2 ) 


















N 


laximum 
















internal 
















area of 


Seven 


times the listed appliance categorized vent area, flue collar area, or draft 


hood out 


let areas. 






chimney 
















(m. 2 ) 















For SI units, 1 in. = 25.4 mm, 1 ft. = 0.305 m, 1,000 Btu/hr = 0.293 kW, 1 in. 2 = 645 mm 2 . 



81 



Table 5-1 2 



UNIFORM PLUMBING CODE 



Table 5-12 

Single-Wall Metal Pipe or Type B Asbestos Cement Vent [NFPA 54: Table 13.1(e)] 





Number of Appliances: 


Single 


Appliance Type: 


Draft Hood-Equipped 


Appliance Vent Connection: 


Connected Directly to Pipe or Vent 








Diameter- 0(in.) 




Height 
H 
(ft) 


Lateral 

L 
(ft) 




To be used with chimney areas within the size limits at bottom 




3 


4 


5 


6 


7 


8 


10 


12 


Appliance Input Rating in Thousands of Btu per Hour 


Maximum Appliance Input Rating in Thousands of Btu per Hour 


6 





39 


70 


116 


170 


232 


312 


500 


750 




2 


31 


55 


94 


141 


194 


260 


415 


620 




5 


28 


51 


88 


128 


177 


242 


390 


600 


8 





42 


76 


126 


185 


252 


340 


542 


815 




2 


32 


61 


102 


154 


210 


284 


451 


680 




5 


29 


56 


95 


141 


194 


264 


430 


648 




10 


24 


49 


86 


131 


180 


250 


406 


625 


10 





45 


84 


138 


202 


279 


372 


606 


912 




2 


35 


67 


111 


168 


233 


311 


505 


760 




5 


32 


61 


104 


153 


215 


289 


480 


724 




10 


27 


54 


94 


143 


200 


274 


455 


700 




15 


NA 


46 


84 


130 


186 


258 


432 


666 


15 





49 


91 


151 


223 


312 


420 


684 


1040 




2 


39 


72 


122 


186 


260 


350 


570 


865 




5 


35 


67 


110 


170 


240 


325 


540 


825 




10 


30 


58 


103 


158 


223 


308 


514 


795 




15 


NA 


50 


93 


144 


207 


291 


488 


760 




20 


NA 


NA 


82 


132 


195 


273 


466 


726 


20 





53 


101 


163 


252 


342 


470 


770 


1190 




2 


42 


80 


136 


210 


286 


392 


641 


990 




5 


38 


74 


123 


192 


264 


364 


610 


945 




10 


32 


65 


115 


178 


246 


345 


571 


910 




15 


NA 


55 


104 


163 


228 


326 


550 


870 




20 


NA 


NA 


91 


149 


214 


306 


525 


832 


30 





56 


108 


183 


276 


384 


529 


878 


1370 




2 


44 


84 


148 


230 


320 


441 


730 


1140 




5 


NA 


78 


137 


210 


296 


410 


694 


1080 




10 


NA 


68 


125 


196 


274 


388 


656 


1050 




15 


NA 


NA 


113 


177 


258 


366 


625 


1000 




20 


NA 


NA 


99 


163 


240 


344 


596 


960 




30 


NA 


NA 


NA 


NA 


192 


295 


540 


890 


50 





NA 


120 


210 


310 


443 


590 


980 


1550 




2 


NA 


95 


171 


260 


370 


492 


820 


1290 




5 


NA 


NA 


159 


234 


342 


474 


780 


1230 




10 


NA 


NA 


146 


221 


318 


456 


730 


1190 




15 


NA 


NA 


NA 


200 


292 


. 407 


705 


1130 




20 


NA 


NA 


NA 


185 


276 


384 


670 


1080 




30 


NA 


J NA 


NA 


NA 


222 


330 


605 


1010 



For SI units, 1 in. = 25.4 mm, 1 ft. = 0.305 m, 1,000 Btu/hr = 0.293 kW, 1 in. = 645 mm" 



82 



WATER HEATERS 



Table 5-13 



Table 5-13 

Exterior Masonry Chimney [NFPA 54: Table 13.1(f)] 



Number of Appliances: 



Appliance Type: 



Appliance Vent Connection: 



Single 



NAT 



Type B Double-Wall Connector 



INTENDED USE: Minim-urn allowable Input Rating of Space-Heating Appliance in Thousands of 8tu per Hour 


Vent Height 
H 

(ft) 


Internal Area of chimney (in. 2 ) 


12 


19 


28 


38 


50 


63 


78 


113 








Local 99% winter design temperature: 3 


7°F or greater 






6 


























8 


























10 


























15 


NA 























20 


NA 


NA 


123 


190 


249 


184 








30 


NA 


NA 


NA 


NA 


NA 


393 


334 





50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


579 








Local 99% winter design temperature: 


27°F to 36°F 






6 








68 


116 


156 


180 


212 


266 


8 








82 


127 


167 


187 


214 


263 


10 





51 


97 


141 


183 


201 


225 


265 


15 


NA 


NA 


NA 


NA 


233 


253 


274 


305 


20 


NA 


NA 


NA 


NA 


NA 


307 


330 


362 


30 


NA 


NA 


NA 


NA 


NA 


419 


445 


485 


50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


763 








Local 99% 


winter design temperature: 


17°F to 26°F 






6 


NA 


NA 


NA 


NA 


NA 


215 


259 


349 


8 


NA 


NA 


NA 


NA 


197 


226 


264 


352 


10 


NA 


NA 


NA 


NA 


214 


245 


278 


358 


15 


NA 


NA 


NA 


NA 


NA 


296 


331 


398 


20 


NA 


NA 


NA 


NA 


NA 


352 


387 


457 


30 


NA 


NA 


NA 


NA 


NA 


NA 


507 


581 


50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 








Local 999? 


winter design temperature 


: 5°F to 16°F 






6 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


416 


8 


NA 


NA 


NA 


NA 


NA 


NA 


312 


423 


10 


NA 


NA 


NA 


NA 


NA 


289 


331 


430 


15 


NA 


NA 


NA 


NA 


NA 


NA 


393 


485 


20 


NA 


NA 


NA 


NA 


NA 


NA 


450 


547 


30 


NA 


. NA 


NA 


NA 


NA 


NA 


NA 


682 


50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


972 




Local 99% winter design temperature: -10°F to 4°F 


6 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


484 


8 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


494 


10 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


513 


15 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


586 


20 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


650 


30 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


805 


50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


1003 








Local 99% winter design 


temperature: - 


11°F or lower 












Not recommended foi 


- any vent conl 


: igurations 







For Si units, 1 in. = 25.4 mm, 1 in." = 645 mm 2 , 1 ft. - 0.305 m, 1,000 Btu per hr = 0.293 kW, °C - (°F - 32)/ 1.: 
Note: See Figure 5-13 for a map showing local 99 percent winter design temperatures in the United States. 



83 



Table 5-14 



UNIFORM PLUMBING CODE 



Table 5-14 

Type B Double-Wall Vent [NFPA 54: Table 13.2(a)] 





Number of Appliances: 


Two or More 


Appliance Type: 


Category 1 


Appliance Vent Connection: 


Type B Double-Wall Connector 


Vent Connector Capacity 


Vent 

Height 

H 

(ft) 


Connector 

Rise 

R 

(ft) 


Type B Double-Wall Vent and Connector Diameter - D (in.) 


3 


4 


5 


6 


7 


Appliance Input Rating Limits in Thousands of Btu per Hour 


FAN 


NAT 


FAN NAT 


FAN NAT 


FAN NAT 


FAN 


NAT 

ISlllil: 


Min 


Max 


Max 


Min 


Max Max 


Min 


Max Max 


Min 


Max Max 


Min 


Max 


6 


1 

2 

O 


22 
23 
24 


37 
41 
44 


26 
31 

iiiii 


35 

37 
38 


66 46 

75 Kllg 
81 62 


46 
48 
49 


106 wmM 
121 m 

132 " % 


58 
60 
62 


164 104 
183 124 
199 139 


77 
79 
82 


225 
253 
275 


■ill 

168 
189 


8 


1 

2 
3 


22 
23 
24 


40 

44 
47 


: 27: . . 

vV;; : 'J;;^& : ; ;:■.;.■■■.■; 

81111 


35 

36 

37 


72 WM& 

80 iiii 

87 :iili;; 


49 
51 

53 


114 wmm. 

128 90 
139 101 


64 
66 
67 


176 109 

195 129 

210 ||i||>; 


84 
86 
88 


243 
269 
290 


148 

175 

lllllll 


10 


1 

2 
3 


22 
23 

24 


43 
47 
50 


•.,.,33.... 

Illlf: 


34 
36 

37 


78 'tffmw. 

86 59 
92 67 


49 
51 

52 


123 mm-M 

136 93 
146 104 


65 

67 
69 


189 113 
206 134 

220 150 


89 
91 

• 94 


257 
282 
303 


ililill 

182 

■111 


15 


1 

2 
3 


21 

22 

24 


50 

53 
55 


; "so- 

suit; 

: 40 


33 

35 
36 


89 mmm 

96 63 
102 71 


47 
49 
51 


142 83 
153 99 
163 lit 


64 
66 
68 


220 : 120 

235 iiiis 

248 j 160 


88 
91 
93 


298 
320 
339 


163 
193 
218 


20 


1 

2 
3 


21 

22 
23 


54 
57 
60 


31 
•37' 


33 

34 
35 


99 sa$i 

105 66 

110 WiiM 


46 

" 48 

50 


157 .. 87. 
167 104 
176 116 


62 
64 
66 


246 nm§v 

259 : 149 
271 : 168 


86 
89 
91 


334 
354 
371 


171 
202 

228 


30 


1 

2 
3 


20 

21 

22 


62 

64 
66 


;: • \33C : 
44 


31 

33 
34 


113 wmM 

118 70 

123 iiifi: 


45 
47 
48 


181 93 
190 110 

198 124 


60 
62 
64 


288 134 

299 BttR 

309 |i|i|. 


83 
85 
88 


391 

408 
423 


.182 

215 1 

liiiii 


50 


1 

2 
3 - 


19 

21 

22 


71 

73 
75 


= i - i :.'-3^:'.. : . 
48 


30 

32 
33 


133 Slpll 
137 76 
141 86 


43 

45 
46 


216 101 
223 119 
229 1.34 


57 
59 
61 


349 mmm 

358 172 
366 194 


78 
81 

83 


477 
490 
502 


■iiii 

234 ! 
263 


100 


1 

2 
3 


18 
19 
20 


82 
83 

84 


37 
44 
50 


28 
30 
31 


158 66 
161 79 
163 89 


40 

42 
44 


262 lifii 

267 123 

272 il38'. 


53 
55 
57 


442 150 

447 :■ 178 
452 : 200 


73 
75 
78 


611 
619 

627 


204 
242 

272 



Common Vent Capacity 


Vent 

Height 

H 


Type B Double-Wall Common Vent Diameter - D (in.) 


4 


5 


6 


7 






Corr 


tbined Appliance Input Rating in Thousands of Btu per h 


lour 






FAN 


FAN 


NAT 


FAN 


FAN 


NAT 


FAN 


FAN 


NAT 


FAN 


FAN 


NAT 


(ft) 


+FAN 


+NAT 


+NAT 


+FAN 


+NAT 


♦NAT 


+FAN 


+NAT 


+NAT 


+FAN 


+NAT 


iiiiBii 


6 


92 


81 


• : 65. 


140 


116 


103 


204 


161 


.'•:.• 147 


309 


248 


200 


8 


101 


90 


v\7a : " 


155 


129 


Wmm§M. 


224 


178 


:■"■■':■ 163 ' 


339 


275 


223 


10 


110 


97 


wmmm 


169 


141 


ililli 


243 


194 


ITS 


367 


299 


242 


15 


125 


112 


91 


195 


164 


••C^ii&^r 


283 


228 


206 


427 


352 


280 


20 


136 


123 


wmfflm 


215 


183 


wmmm 


314 


255 


^P::$2&::Y: 


475 


394 


310 


30 


152 


138 


118 


244 


210 


:v: US 


361 


297 


•• " : m" 


547 


459 


360 


50 


167 


153 


134 


279 


244 


214 


421 


353 


310 


641 


547 


423 


100 


175 


163 


wmmmM 


311 


277 


NA 


489 


421 


NA 


751 


658 


479 



For SI units, 1 in. = 25.4 mm, 1 in. 2 = 645 mm 2 , 1 ft. = 0.305 m, 1000 Btu per hr = 0.293 kW. 



84 



WATER HEATERS 



Table 5-14 continued 



Table 5-14 

Type B Double-Wall Vent [NFPA 54: Table 13.2(a)] (continued) 





Number of Appliances: 


Two or More 


Appliance Type: 


Category 1 


Appliance Vent Connection: 


Type B Double Wall Connector 


Vent Connector Capacity 


Vent 

Height 

H 

(ft) 


Connector 

Rise 

R 

(ft) 


Type B Double-Wall Vent and Connector Diameter - 0(in.) 


8 9 


10 


Appliance Input Rating Limits in Thousands of Btu per Hour 


FAN III 


FAN NAT 


FAN 


NAT 


Min 


Max Max 


Min 


Max Max 


Min 


Max 


Max 


6 


1 

2 
3 


92 

95 
97 


296 ; 185 

333 220 
363 248 


109 
112 
114 


37(i 237 

424 11111:1': 

463 317 


128 
131 
134 


466 

526 B 

575 % 


289 

' '345' 


8 


1 

2 
3 


100 
103 
105 


320 194 
356 ; 230 

384 iliiiti 


118 

121 
123 


408 1124|S 
454 294 
492 330 


138 
141 
143 


507 

564 1 
612 If 


303 
358 
402 


10 


1 

2 
3 


106 
109 
111 


341 200 

374 lllli^ 
402 268 


125 
128 
131 


436 WiM&k 
479 : 305 

515 ll:;il|ii| 


146 
149 
152 


542 | 
596 e| 
642 | 


lllll 
417 


15 


1 

2 

3 


110 
112' 

115 


389 SfHilJ 
419 fillip: 
445 286 


134 
137 
140 


493 mmm 

532 il;i|i:i 

565 3t>5 


162 
165 
167 


609 ; 

658 

700 :; 


333 ' 

394 

444 


20 


1 

2 
3 


107 
110 
113 


436 lillll 
463 ; 265 
486 300 


131 
134 
137 


552 285 

587 liili 

618 383 


158 
161 
164 


681 i; 
725 | 
764 


■ -347 
414 : 
466 


30 


1 

2 
3 


103 
105 
108 


512 238 

535 SSflfc 
555 ' " 517 


125 
129 
132 


649 wmmrn^ 

679 360 

706 i;ii|||f 


151 
155 
158 


802 | 

840 1 
874 § 


372 
439 
494 


50 


1 

2 
3 


97 
100 
103 


627 11111- 
645 : 306 
661 ; 343 


120 
123 
126 


797 330 
820 . 392 
842 441 


144 
148 
151 


984 ;!: 

1014 i 
1043 | 


: -;"40r : 
478 

illi 


100 


1 
2 
3 


91 

94 

97 


810 266 
822 3.16 
834 355 


112 
115 
118 


1038 ilSiJt 
1054 405 

1069 lllii; 


135 
139 

142 


1285 i 
1306 | 
1327 | 


494 



Common Vent Capacity 


Vent 


Type B Double-Wall Common Vent Diameter - D (in.) 


8 


9 


10 


Height 
H 


Combined Appliance Input Rating in Thousands of Btu per Hour 


FAN 


FAN NAT 


FAN 


FAN MAT 


FAN 


FAN ! 


NAT 


(ft) 


+FAN 


+NAT +NAT 


+FAN 


+NAT +NAT 


+FAN 


+NAT 


+NAT 


6 


404 


314 260 


547 


434 KSIi^S 


672 


520 ! 


410 


8 


444 


348 290 


602 


480 378 


740 


577 \ 


465 


10 


477 


377 l:lil::f; 


649 


522 llfllif 


800 


627 ! 


495 


15 


556 


444 . 365 


753 


612 mmmm 


924 


733 ! 


■ . 565 


20 


621 


499 405 


842 


688 wmmm 


1035 


826 ■! 


640 


30 


720 


585 470 


979 


808 605 


1209 


975 ; 


740 


50 


854 


706 550 


1164 


977 705 


1451 


1188 ! 


860 


100 


1025 


873 m^$mg. 


1408 


1215 800- 


1784 


1502 . 


975 



For SI units, 1 in. - 25.4 mm, 1 in. 2 = 645 mm 2 , 1 ft. = 0.305 m, 1000 Btu per hr = 0.293 kW. 



85 



Table 5-14 continued 



UNIFORM PLUMBING CODE 



Table 5-14 

Type B Double-Wall Vent [NFPA 54: Table 13.2(a)] (continued) 





Number of Appliances: 


Two or More 






Appliance 


Type: 


Category 1 


Appliance Vent Connection: 


Type B Double-Wall Connector 


Vent Connector Capacity 


Vent 

Height 

H 

(ft) 


Connector 

Rise 

R 

(ft) 




Type B Double-Wall Vent and Connector Diameter - D (in 


■) 




12 


14 


16 




18 






Appliance Input Rating Limits 


in Thousands of Btu per Hour 




FAN 


NAT 


FAN 


W$M 


FAN 


NAT 


FAN 


NAT 


Min 


Max 


lltlil 


Min 


Max 


Max 


Min 


Max 


Max 


Min 


Max 


Max 


6 


2 
4 
6 


174 
180 

NA 


764 

897 

NA 


496 

llilil 

NA 


223 
230 

NA 


1046 
1231 

NA 


827 

NA 


281 

287 

NA 


1371 
1617 

NA 


853 

ioai 

111! 


346 

352 
NA 


1772 
2069 

NA 


1080 
1370 

" NA . 


8 


2 
4 
6 


186 
192 

198 


822 

952 

1050 


1111111 
644 
772 


238 
244 

252 


1126 
1307 
1445 


696 
1.072 


298 
305 
313 


1478 
1719 
1902 


. 910 
11 50 
1390 


365 
372 
380 


1920 
2211 
2434 


1150 
1460 
1770 


10 


2 
4 
6 


196 
201 

207 


870 

997 

1095 


536 
664 

792 


249 
256 
263 


1195 
1371 
1509 


1118 


311 
318 

325 


1570 
1804 
1989 


955 

iiiBi 

Bill 


379 

387 
395 


2049 

2332 

2556 


1205 : 
1535 . 
1865 


15 


2 
4 
6 


214 
221 

228 


967 
1085 
1181 


lliiil 
712 
856 


272 
279 
286 


1334 
1499 
1632 


790 
1006 
1222 


336 

344 
351 


1760 
1978 

2157 


1030 
1320 
1610 


408 
416 

424 


2317 
2579 
2796 


1305 

lwl;l 

j 2025 ' 


20 


2 
4 
6 


223 
230 

237 


1051 
1162 

1253 


3% 

748 
960 


291 

298 
307 


1443 
1597 
1726 


cS40 
1064 
1288 


357 
365 

373 


1911 
2116 

2287 


1Q95. 
1395 
1695 


430 
438 
450 


2533 
2778 
2984 


. 13.85... 
1765 
2145 


30 


2 
4 
6 


216 
223 
231 


1217 
1316 
1400 


632 
952 


286 
294 
303 


1664 
1802 
1920 


910 
1160 
1410 


367 

376 
384 


2183 
2366 

2524. 


1190 
1510 
1830 


461 

474 
485 


2891 
3110 
3299 


1540 
1920 
2340 


50 


2 
4 
6 


206 
213 

221 


1479 
1561 
1631 


1031 


273 
281 
290 


2023 
2139 

2242 


1007 
1291 

1575 


350 
359 
369 


2659 
2814 
2951 


1315 
16^5 
2055 


435 

447 
461 


3548 
3730 

3893 


1665 

2135 
2605 


100 


2 
4 
6 


192 
200 
208 


1923 

1984 
2035 


712 

8£8 

. 1064 


254 
263 

272 


2644 
2731 
2811 


1050 

13461 

1642 


326 
336 
346 


3490 
3606 

3714 


1370 

fllllll 

■ilii 


402 
414 
426 


4707 
4842 
4968 


1740 
2220 

,2700 



Common Vent Capacity 


Vent 

Height 

H 


Type B Double-Wail Common Vent Diameter - D (in.) 


12 


14 


16 


18 


Combined Appliance Input Rating in Thousands of Btu per Hour 


FAN 


fan iiiili 


FAN 


FAN 


NAT 


FAN 


FAN 


NAT 


FAN 


FAN 


■All 


(ft) 


+FAN 


+nat iiiili 


+FAN 


+NAT 


+NAT 


+FAN 


+NAT 


♦NAT 


+FAN 


+NAT 


iiiiii 


6 


900 


696 iiiBii 


1284 


990 


mmm 


1735 


1336 


1065 


2253 


1732 


1345 


8 


994 


773 652 


1423 


1103 


ililSl 


1927 


1491 


1190 


2507 


1936 


1510 


10 


1076 


841 712 


1542 


1200 


995: 


2093 


1625 


1300 


2727 


2113 


1645 


15 


1247 


986 825 


1794 


1410 


1158 


2440 


1910 


1510 


3184 


2484 


1910 


20 


1405 


1116 916 


2006 


1588 


1290 


2722 


2147 


1690 


3561 


2798 


2140 


30 


1658 


1327 1025 


2373 


1892 


iS25;-'.'. 


3220 


2558 


1990 


4197 


3326 


2520 


50 


2024 


1640 1280 


2911 


2347 


1863 


3964 


3183 


2430 


5184 


4149 


3075 


100 


2569 


2131 1670 


3732 


3076 


2450 


5125 


4202 


3200 


6749 


5509 


4050 



For SI units, 1 in. = 25.4 mm, 1 in." = 645 mm*, 1 ft. = 0.305 m, 1000 Btu per hr = 0.293 kW. 



86 



WATER HEATERS 



Table 5-14 continued 



Table 5-14 

Type B Double-Wall Vent [NFPA 54: Table 13.2(a)] (continued) 





Number of Appliances: 


Two or More 


Appliance Type: 


Category 1 


Appliance Vent Connection: 


Type B Double-Wall Connector 


Vent Connector Capacity 


Vent 

Height 

H 

(ft) 


Connector 

Rise 

Ft 

(ft) 


Type B Double-Wall Vent and Connector Diameter - D (in.) 


20 


22 


24 


Appliance Input Rating Limits in Thousands of Btu per Hour 


FAN NAT I FAN NAT 


FAN NAT 


Min 


Max Max 


Min 


Max Max 


Min 


Max Max 


6 


2 
4 
6 


NA 
NA 
NA 


na m^m 
na |lli§| 

NA |||ill 


NA 
NA 
NA 


NA 1SI11- 

na §||ii| 

NA NA 


NA 
NA 
NA 


NA NA 

na m^m 

na : 11|§:;| 


8 


2 
4 
6 


NA 
471 

478 


NA iitf$J& 

2737 mm 

3018 2180 


NA 
560 

568 


NA NA 
3319 2180 
3665 2640 


NA 
662 
669 


na mmm§ 

3957 .2590.. 
4373 3130 


10 


2 
4 
6 


NA 
486 
494 


na WMmmi 

2887 1890 
3169 2290 


NA 
581 
589 


na wmm^ 

3502 2280 
3849 ...:;276p:. 


NA 
686 
694 


NA NA 
4175 2710 
4593 3270 


15 


2 
4 
6 


NA 

523 
533 


na mmM 

3197 2060 
3470 2510 


NA 
624 
634 


NA NA 
3881 2490 
4216 3030 


NA 
734 

743 


NA WW& 
4631 2960 
5035 3600 


20 


2 
4 
6 


NA 
554 
567 


na mmm 

3447 2180 
3708 2650 


NA 
661 
671 


na iBUlg 

4190 2630 
4511 3190 


NA 
772 
785 


na llsi;-; 

5005 3130 
5392 3790 


30 


2 
4 
6 


NA 
619 
632 


na mm$m 
3840 lliift 

4080 2875 


NA 
728 
741 


NA NA 
4861 2860 
4976 3480 


NA 
847 
860 


NA NA 
5606 ,3410 
5961 4150 


50 


2 
4. 
6 


NA 
580 
594 


na mmm 

4601 2633 
4808 JllllI 


NA 
709 
724 


NA UK 
5569 3185 
5826 3885 


NA 
851 

867 


na ymmmk 

6633 3790 
6943 4620 


100 


2 
4 
6 


NA 
523 
539 


NA NA 
5982 lllflll 
6143 3350 


NA 
639 
654 


NA lllll 
7254 ' '3330' 
7453 4070 


NA 
769 
786 


na mmm:^. 

8650 3950 
8892 4810 



Common Vent Capacity 


Vent 

Height 

H 


Type B Double-Wall Common Vent Diameter- D(in.) 


20 


22 


24 




Combined ApplK 


ance Input Rating in Thousan 


ds of Btu 


per Hour 




FAN 


FAN 


■iiiii 


FAN 


FAN NAT 


FAN 


FAN 


NAT 


(ft) 


+FAN 


+NAT 


+NAT 


+FAN 


+NAT +NAT 


+FAN 


+NAT 


♦NAT 


6 


2838 


2180 


1660^ 


3488 


2677 1970 


4206 


3226 


2390 


8 


3162 


2439 


1860 


3890 


2998 2200 


4695 


3616 


26W 


10 


3444 


2665 


2030 


4241 


3278 2400 


5123 


3957 


2920 


15 


4026 


3133 


2360 


4971 


3862 2790 


6016 


4670 


3400 


20 


4548 


3552 


. 2640 


5573 


4352 3120 


6749 


5261 


3300 


30 


5303 


4193 


3110 


6539 


5157 3680 


7940 


6247 


4480 


50 


6567 


5240 


3&)0 


8116 


6458 4500 


9837 


7813 


llilli! 


100 


8597 


6986 


■'5000- 


10,681 


8648 5920 


13,004 


10,499 


7200 



For SI units, 1 in. = 25.4 mm, 1 in. 2 - 645 mm 2 , 1 ft. - 0.305 m, 1000 Btu per hr = 0.293 kW. 



87 



Table 5-15 



UNIFORM PLUMBING CODE 



Table 5-15 

Type B Double-Wall Vent [NFPA 54: Table 13.2(b)] 





Number of Appliances: 


Two or More 


Appliance Type: 


Category 1 


Appliance Vent Connection: 


Single-Wall Metal Connector 


Vent Connector Capacity 


Vent 

Height 

H 

(ft) 


Connector 

Rise 

R 

(ft) 








Single-Wall Metal Vent Connector Diameter - D (in 


•) 








3 


4 


5 


6 


7 








Appliance Input Rating Limits in Thousands of Btu per 


■ Hour 








FAN 


NAT 


FAN NAT 


FAN NAT 


FAN 


NAT 

Max 


FAN 


NAT 
Max 


Min 


Max 


Max 


Min 


Max Max 


Min 


Max Max 


Min 


Max 


Min 


Max 


6 


1 

2 
3 


NA 
NA 
NA 


NA 
NA 
NA 


2h 
31 
34 


NA 
NA 
NA 


NA lllSll:. 

na §11:1;; 

NA t|i#||| 


NA 
NA 
121 


na mmm 

NA : 85 

131 fling 


NA 
168 
175 


NA 
182 
198 


102 
123 

' 138 


207 
215 

222 


223 
251 

273 


140 
167 

188 


8 


1 
2 
3 


NA 
NA 
NA 


NA 
NA 
NA 


mmm 

32 
..35 


NA 
NA 
NA 


na iiiii 

NA Ilili 
NA ■ 64 


NA 
125 
130 


na mmM 

126 89 
138 100 


NA 
184 
191 


NA 
193 

208 


106 

1.27 
:-:$#i; 


226 
234 

241 


240 
266 
287 


liiiill 

173 
197 


10 


1 

2 
3 


NA 
NA 
NA 


NA 
NA 
NA 


28 
33 

fife 


NA 
84 
89 


NA ■ 50 

85 llllt 
91 67 


119 
124 
129 


121 77 
134 91 
144 102 


182 
189 
197 


186 
203 

217 


no : 

132 : 

148 ; 


240 
248 

257 


253 
278 
299 


150 
183 

llilll 


15 


1 

2 
3 


NA 
NA 
NA 


NA 
NA 
NA 


29 
39 


79 
83 

87 


87 P$l!! 

94 62 
100 70 


116 
121 
127 


138 iivSlll: 
150 97 
160 109 


177 
185 
193 


214 
230 

243 


116 
138 


238 
246 

255 


291 

314 

333 


iiiiiii 

215 


20 


1 

2 

3 


49 

52 
55 


56 

59 
62 


30 

36 

: 40 


78 
82 

87 


97 wmm 

103 64 
107 72 


115 
120 
125 


152 mMiS. 

163 101 

172 113 


175 
182 
190 


238 

252 
264 


120 
144 
164 


233 
243 

252 


325 
346 
363 


iiiiil 

197 

.223 


30 


1 
2 
3 


47 
51 

54 


60 

62 
64 


31 

§§!§!! 


77 
81 

85 


110 WMM: 

115 67 
119 76 


112 
117 

122 


175 . 89 
185 106 
193 120 


169 

177 
185 


278 
290 
300 


129 

152- 
172 


226 
236 
244 


380 
397 

412 


175 

"208' 
235 


50 


1 
2 
3 


46 
49 

52 


69 

71 

72 


:!! : ;:- : ':iSll 

40 

45 


75 
79 
83 


128 60 

132 llllli 
136 llSll 


109 
114 
119 


207 96 
215 113 
221 123 


162 
170 
178 


336 

345 
353 


164 
1% 


217 
226 

235 


460 

473 
486 


188 

Sill 
IB!!! 


100 


1 

2 
3 


45 
48 
51 


79 
80 
81 


sail 

■46 


71 

75 
79 


150 6! 

153 iSiii 

157 lll|| 


104 
110 
114 


249 ifli 
255 ■ 115 
260 129 


153 
160 

168 


424 

428 

433 


140 
167 
190 


205 

212 

222 


585 
593 
603 


lililll 
ilBli 

lllllll 



Common Vent Capacity 


Vent 

Height 

H 


Type B Double-Wall Common Vent Diameter - D (in.) 


4 


5 


6 


7 






Co 


mbined Appliance Input Rating in Thousands of Btu per 


Hour 






FAN 


FAN 


NAT 


FAN 


FAN NAT 


FAN 


FAN NAT 


FAN 


FAN 


liiliili 


(ft) 


+FAN 


+NAT 


IINill 


+FAN 


+NAT +*JAT 


+FAN 


+NAT +NAT 


+FAN 


+NAT 


iiiiiii 


6 


NA 


78 


msmrn 


NA 


113 mans 


200 


158 llllillf 


304 


244 


lllllll 


8 


NA 


87 


n 


NA 


126 111 


218 


173 159 


331 


269 


218 


10 


NA 


94 


76 


163 


137 iiiiliti- 


237 


189 174 


357 


292 


236 


15 


121 


108 


.88 


189 


159 140 


275 


221 !■ 200 


416 


343 


274 


20 


131 


118 


■ 98 


208 


177 1111111 


305 


247 lliiSl; 


463 


383 


302 


30 


145 


132 


113 


236 


202 180 


350 


286 illlill 


533 


446 


349 


50 


159 


145 


128 


268 


233 208 


406 


337 296 


622 


529 


410 


100 


166 


153 


NA 


297 


263 iiiiiii: 


469 


. 398 wmmmm 


726 


633 


464 



For SI units, 1 in. = 25.4 mm, 1 in. 2 = 645 mm 2 , 1 ft. = 0.305 m, K)00 Btu per hr = 0.293 kW. 



88 



WATER HEATERS 



Table 5-15 continued 



Table 5-15 

Type B Double-Wall Vent [NFPA 54: Table 13.2(b)] (continued) 





Number of Appliances: Two or More 


Appliance Type: \ Category 1 


Appliance Vent Connection: Single-Wall Metal Connector 


Vent Connector Capacity 


Vent 
Height 


Connector 
Rise 


Single-Wall Metal Vent Connector Diameter - D (in.) 


8 


9 


10 


Appliance Input Rating Limits in Thousands of Btu per Hour 


FAN 


NAT 


FAN NAT 


FAN 


NAT 


















H 
(ft) 


R 
(ft) 


Min 


Max 


ft/fax 


Min 


Max Max 


Min 


Max 


Max 


6 


1 


262 


293 


183 


325 


373 mm.;wmm.. 


447 


463 


mmmm 




2 


271 


331 


219 


334 


422 281 


458 


524 


344 




3 


279 


361 


SiHIl 


344 


462 316 


468 


574 


■■:■'■'"?$&'.'■} : 


8 


1 


285 


316 


191 


352 


4.03 244 ■ 


481 


502 


2yQ 




2 


293 


353 


*;mmmm 


360 


' 450 WMm®--m:- 


492 


560 


355 




3 


302 


381 


msm^M. 


370 


489 siiilti;!! 


501 


609 


400 


10 


1 


302 


335 


mm^mmm 


372 


429 W§mm 


506 


534 


308 




2 


311 


369 


235 


381 


473 302 . 


517 


589 


:>68 




3 


320 


398 


265 


391 


511 339 


528 


637 


mmmmm 


15 


1 


312 


380 


wMmwM 


397 


482 WM^mBMB 


556 


596 


324 




2 


321 


411 


248 


407 


522 m^MBMm 


568 


646 


. . .3S7 . .. 




3 


331 


438 


281 


418 


557 .360 


579 


690 


437 


20 


1 


306 


425 


217 


390 


538 w^mmmm 


546 


664 


336 




2 


317 


453 


•259- ' 


400 


574 331 


558 


709 


403 




3 


326 


476 


IllSili 


412 


607 m§wm 


570 


750 


457 


30 


1 


296 


497 


Cr<-^f^.' 


378 


630 wg<mm 


528 


779 


.•".•". -:358..' ;; 




2 


307 


521 


... 274...... 


389 


662 349 


541 


819 


425 




3 


316 


542 


309 


400 


690 394 


555 


855 


?;is§^§i 


50 


1 


284 


604 


245 


364 


768 M^mm^B 


507 


951 


m^mmm-: 




2 


294 


623 


293 


376 


793 WwmmmM 


520 


983 


458 




3 


304 


640 


331- ■ "• 


387 


816 423 


535 


1013 


518 


100 


1 


269 


774 


249 


345 


993 mMMmm 


' 476 


1236 


393 . 




2 


279 


788 


': 299 


358 


ion wBBBm-m 


490 


1259 


469 




3 


289 


801 


339 


368 


1027 431 


506 


1280 


mmm:&B 



Common Venl 


Capacity 












Vent 

Height 

H 


Type B Double-Wall Common Vent Diameter - D (in.) 


8 


9 


10 






Combined Appliance Input Rating in Thousands 


of Btu per Hour 




FAN 


FAN 


NAT 


FAN 


FAN NAT 


FAN 


FAN 


NAT 


(ft) 


+FAN 


+NAT 


+NAT 


+FAN 


+NAT +NAT 


+FAN 


+NAT 


W-^MM 


6 


398 


310 


■ . -257 = : ■ 


541 


429 wM^mmm 


665 


515 


wmmmm 


8 


436 


342 


; ■285'.-; 


592 


473 iwmmmm 


730 


569 


460 


10 


467 


369 


309 


638 


512 398 


787 


617 


mBmvmm 


15 


544 


434 


357 


738 


599 WBimMSM: 


905 


718 


:-:.: ?•: 553. : 


20 


606 


487 


:•:;";..'::'»:'-::■•" 


824 


673 mmMmMm 


1013 


808 


626 


30 


703 


570 


459 


958 


790 iiiiiiii: 


1183 


952 


- 723 • 


50 


833 


686 


535 


1139 


954 wm^mmMB 


1418 


1157 


WM'smBm 


100 


999 


846 


606 


1378 


1185 780 


1741 


1459 


m^m^MM 



For SI units, 1 in. = 25.4 mm, 1 in.- - 645 mm", 1 ft. = 0.305 m, 1000 Btu per hr = 0.293 kW. 



89 



Table 5-16 



UNIFORM PLUMBING CODE 



Table 5-16 

Masonry Chimney [NFPA 54: Table 13.2(c)] 





Number of Appliances: 


Two or More 


Appliance Type: 


Category 1 


Appliance Vent Connection: 


Type B Double-Wall Connector 


Vent Connector Capacity 


Vent 

Height 

H 

(ft) 


Connector 

Rise 

R 

(ft) 








Type B Double- Wall Vent Connector Diameter - D ( 


n.) 








3 


4 


5 


6 






7 










Appliance Input Rating Limits in Thousands of Btu pei 


- Hour 








FAN 


NAT 


FAN NAT 


FAN NAT 


FAN 


NAT 


FAN 


NAT 


Min 


Max 


Max 


Min 


Max Max 


Min 


Max Max 


Min 


Max 


Max 


Min 


Max 


|ljj|§|§ 


6 


1 

2 
3 


24 
26 

27 


33 
43 
49 


mmm 

34/ 


39 

41 
42 


62 m^mm 

79 lillfl 
92 §|||i 


52 
53 

55 


106 67 

133 Sllli; 

155 97. 


65 

67 
69 


194 
230 
262 


101 
124 
143 


87 
89 
91 


274 
324 
369 


iiiiiii 

173 

203 


8 


1 

2 

3 


24 
26 
27 


39 

47 
52 


....22...:.. 
29 


39 
40 

42 


72 W^MiM 

87 plfl' 
97 : 62 


55 
57 
59 


117 69 
140 86 
159 98 


71 

73 
75 


213 
246 
269 


105 

127 
145 


94 
97 
99 


304 
350 

383 


■lilt 

179 
206 


10 


1 

2 
3 


24 
26 

27 


42 
50 

55 


•-•■29- : 

■ >5\: 


38 
40 
41 


80 jfsii 

93 lllti 
105 63 


55 
57 
58 


130 'mmm 

153 ■■ 87 ■' 
170 100 


74 
76 

78 


232 
261 

284 


108 
1.29 

148 


101 
103 
106 


324 
366 

397 


liill! 
■184 
209 


15 


1 

2 

3 


24 
25 
26 


48 
55 
59 


mm-: 
31 

: '35" 


38 
39 
41 


93 44 

105 l ; :IItli 

us mmwm 


54 
56 

57 


154 iiifii 

174 iiiiis 

189 102 


72 
74 
76 


277 
299 
319 


153' ' 


100 
103 
105 


384 
419 
448 


164 
192 

215 


20 


1 

2 
3 


24 

25 
26 


52 
58 
63 


mimm 

31 

;..'35 : " 


37 
39 
40 


102 §mm 

114 56 

123 iiii! 


53 
55 
57 


172 tm??m 

190 91 
204 104 


71 

73 
75 


313 

335 
353 


119 

.138 = 
.157...., 


98 
101 
104 


437 

467 
493 


Illlli; 

199 

222 


30 


1 

2 

3 


24 
25 
26 


54 
60 
64 


BUS 

gllll 


37 
38 
40 


Ill Bill; 

122 i/lit 

131 ; 66 


52 
54 
56 


192 ;-;,:ilf: 
208 95 . 
221 107 


69 

72 
74 


357 
376 
392 


• : :-i;27r-: 

■ 145 - 
163 


96 

99 

101 


504 

531 
554 


U7 
209 

233 


50 


1 

2 
3 


23 
24 
26 


51 
59 

64 


■ 25. 

: : '32y, 

36 


36 

37 
39 


116 mmm 

127 61 
135 69 


51 

53 
55 


209 m^mm 

225 102 

237 mm" 


67 

70 

72 


405 

421 
435 


161 
180 


92 
95 
98 


582 
604 
624 


213 

illiiii 

260 


100 


1 

2 
3 


23 
24 

25 


46 
53 
59 


31 

': 35". 


35 
37 
38 


108 lllii 

120 iiiii 

130 ,;6S..... 


49 
51 

53 


208 iiill 
224 105 
237 118 


65 
67 
69 


428 
444 

458 


155 : 
174 
193 ; 


88 
92 
94 


640 
660 
679 


237 

■ill 
■Bill 



Common Vent Capacity 


Vent 

Height 

H 


Minimum Internal Area of Masonry Chimney Flue (in. 2 ) 


12 


19 


28 


38 


50 








Combined Appliance Input Rating in 


Thousands of Btu per 


Hour 








FAN 


FAN 


NAT 


FAN 


FAN HAT 


FAN 


FAN 


NAT 


FAN 


FAN 


NAT 


FAN 


FAN 


NAT 


(ft) 


+FAN 


+NAT 


■Ml 


+FAN 


+NAT +NAT 


+FAN 


+NAT 


mm 


+FAN 


+NAT 


;*Nii : 


+FAN 


+NAT 


liiiii 


6 


NA 


74 


lllili! 


NA 


119 Iftlili 


NA 


178 


1I1II! 


NA 


257 


103 


NA 


351 


illiiii 


8 


NA 


80 


28 


NA 


130 mmmm 


NA 


193 


:«2- ■ 


NA 


279 


119 


NA 


384 


163 


10 


NA 


84 \ 


31 


NA 


138 Iliiil 


NA 


207 


90 ! 


NA 


299 


131 


NA 


409 


177 


15 


NA 


NA ; 


36 


NA 


152 67 


NA 


233 


"106 


NA 


334 


■- 152 


523 


467 


212 


20 


NA 


NA ; ; 


4\ 


NA 


na iiiii: 


NA 


250 


,l:22; : .;, 


NA 


368 


172 


565 


508 


243 


30 


NA 


NA 


iiiii 


NA 


na iiilfl 


NA 


270 


137; 


NA 


404 


198 


615 


564 


278 


50 


NA 


NA 


NA 


NA 


na SSfflEi 


NA 


NA 


m%m 


NA 


NA 


NA 


NA 


620 


328 


100 


NA 


NA 


NA 


NA 


NA NA 


NA 


NA 


NA 


NA 


NA 


■ NA. 


NA 


NA 


liiiii 



For SI units, 1 in. = 25.4 mm, 1 in. 2 = 645 mm 2 , 1 ft. = 0.305 m, 1000 Btu per hr = 0.293 kW. 



90 



WATER HEATERS 



Table 5-16 continued 



Table 5-16 

Masonry Chimney [NFPA 54: Table 13.2(c)] (continued) 













Number of Appliances: j Two or More 




Appliance Type: Category 1 


Appliance Vent Connection: Type B Double-Wall Connector 


Vent Connector Capacity 


Vent 
Height 


Connector 
Rise 


Type B Double-Wall Vent Connector Diameter - D (in.) 


8 


9 


10 


Appliance Input Rating Limits in Thousands of Btu per Hour 


FAN m$MM 


FAN NAT 


FAN 


NAT 
















H 


R 


Min 


Max Max 


Min 


Max Max 


Min 


Max 


Max 


(ft) 


(ft) 
















6 


1 


104 


370 SSaSWtf 


124 


479 mM^mM:^ 


145 


599 


319 




2 


107 


436 %MM&& 


127 


562 300 


148 


694 


■ 378 




3 


109 


491 mi§^m 


129 


633 349 


151 


795 


439 


8 


1 


113 


414 210 


134 


539 %S0BSm 


156 


682 


335 




2 


116 


473 240 


137 


615 311 


160 


776 


394 




3 


119 


517 mm&m 


139 


672 358 


163 


848 


452 


10 


1 


120 


444 21b 


142 


582 w&mm 


165 


739 


348 




2 


123 


498 247 . 


145 


652 .321 


168 


825 


407 




3 


126 


540 281 


147 


705 . 366 . 


171 


893 


SS*!ii : ! 


15 


1 


125 


511 229 


153 


658 mm^smm 


184 


824 


• •••375. ■}■■■ 




2 


128 


558 .260 


156 


7i8 [§g38t)K 


187 


900 


■ "432 




3 


131 


597 292 


159 


760 382 


190 


960 


486 


20 


1 


123 


584 wmmmm 


150 


752 HfKSiSS 


180 


943 


"•• '-i$7- : .-.•'■ 




2 


126 


625 270 


j 153 


805 354 


184 


1011 


. 452 




3 


129 


661 iigMiit 


156 


851 Slltlgil 


187 


1067 


fmmm 


30 


1 


119 


680 WM^mm 


145 


883 W§vm$& 


175 


1115 


^mm^m 




2 


122 


715 K8iSI§& 


149 


928 w^:mmm 


179 


1171 


484 




3 


125 


746 ff:Mm&m 


152 


968 ^m^m 


182 


1220 


•535 


50 


1 


115 


798 294 


140 


1049 m&B&M 


168 


1334 


W&$($KI£r 




2 


118 


827 m:mmmm: 


143 


loss m&mmm 


172 


1379 


■ ■ • '5S8 •••;• •• 




3 


121 


854 mMvm 


147 


1118 474 


176 


1421 


611 


100 


1 


109 


907 334 


134 


1222 ■fmmm : m 


161 


1589 


596 




2 


113 


933 mmmmm 


138 


1253 A97 


165 


1626 


651 




3 


116 


956 399 


141 


1282 540 


169 


1661 


705 




Common Vent Capacity 


Vent 

Height 

H 


Minimum Internal Area of Masonry Chimney Flue (in. 2 ) 


63 


78 


113 


Combined Appliance Input Rating in Thousands of Btu per Hour 


FAN 


FAN 


<m;mmm 


FAN 


FAN NAT 


FAN 


FAN 


NAT 


(ft) 


+FAN 


+NA* 


r iiHi 


+FAN 


+NAT 'mgW&m 


+FAN 


+NAT 


+NAT 


6 


NA 


458 


188 


NA 


582 246 


1041 


853 


NA 


8 


NA. 


501 


216 


724 


636 . mmmmm 


1144 


937 


408 


10 


606 


538 


. 236 


776 


686 302 


1226 


1010 


•••V:4S* : -:/-.- 


15 


682 


611 


.283 


874 


781 365 


1374 


1156 


546 • 


20 


742 


668 


.,•:'••: -.:32g:-. , 


955 


858 419 


1513 


1286 


648 


30 


816 


747 


%^!M^: j - 


1062 


969 4% 


1702 


1473 


749 


50 


879 


831 


461 


1165 


1089 606 


1905 


1692 


922 


100 


NA 


NA 


499 


NA 


NA 669 


2053 


1921 


... . 1058 . 



For SI units, 1 in. = 25.4 mm, 1 in. = 645 mm 2 , 1 ft. = 0.305 m, 1000 Btu per hr = 0.293 kW. 



91 



Table 5-17 



UNIFORM PLUMBING CODE 



Table 5-17 

Masonry Chimney [NFPA 54: Table 13.2(d)] 





Number of Appliances: 


Two or More 


Appliance Type: 


Category 1 


Appliance Vent Connection: 


Single-Wall Metal Connector 


Vent Connector Capacity 


Vent 

Height 

H 

(ft) 


Connector 

Rise 

R 

(ft) 








Single-Wall Metal Vent Connector Diameter - D (in 


■) 








3 


4 


5 


6 


7 








Appliance Input Rating Limits in Thousands of Btu per 


Hour 








FAN 


NAT 


FAN NAT 


FAN NAT 


FAN 


NAT 


FAN 


NAT 


Min 


Max 


Max 


Min 


Max Max 


Min 


Max Max 


Min 


Max 


Max 


Min 


Max 


Max 


6 


1 

2 
3 


NA 
NA 
NA 


NA 
NA 
NA 


Mmm 

28 


NA 
NA 
NA 


na wmm. 

na ::iiii:: 

NA 61 


NA 
NA 
134 


NA 66 
NA ■ 84 
153 97 


179 
186 
193 


191 

227 
258 


100 
123 

142 ' 


231 
239 

247 


271 
321 

365 


140 

•17i:i 
202 


8 


1 
2 
3 


NA 
NA 
NA 


NA 
NA 
NA 


...:,2i • 

. 28 

; . 34 


NA 
NA 
NA 


NA 40 

NA :i|lii 

NA . 62 


NA 
137 
143 


NA ...68 ■ 
139 85 

156 :i|:9l§ 


195 
202 
210 


■208 
240 
264 


103 

•lBi." : 

illli:.:: 


250 
258 
266 


298 
343 
376 


146 
177 
205 


10 


1 

2 
3 


NA 
NA 
NA 


NA 
NA 
NA 


•: 21 
29 

•■,34 • 


NA 

NA 

97 


NA 4! 

na ^:m$ 

102 62 


130 
136 

143 


151 iiiMi 
150 86 
166 99 


202 
210 

217 


225 
255 
277 


106 
128 
147 


267 

276 
284 


316 

358 
389 


151 
181 
207 


15 


1 

2 
3 


NA 
NA 
NA 


NA 
NA 
NA 


• -.23i 
30 

; 34' 


NA 
92 
96 


na mmm 

103 i§l|f 
112 63 


129 
135 
141 


151 73 
170 88 
185 101 


199 
207 
215 


271 
295 
315 


112 
151 


268 

277 
286 


376 
411 

439 


161 
189 

213 


20 


1 

2 
3 


NA 

NA 
NA 


NA 
NA 
NA 


• .23 
30 

: -35; i 


87 
91 
96 


99 wm§ 
in iiiii 

119 64 


128 
134 
140 


167 76 
185 90 
199 103 


197 

205 
213 


303 

325 
343 


: --!l7i- 
136 
154 


265 

274 
282 


425 

455 
481 


169 
195 

219 


30 


1 
2 
3 


NA 
NA 
NA 


NA 
NA 
NA 


^ 24-. 

31 

tlflli 


86 
91 
95 


108 wmm 

119 iiiii: 

127 lllll 


126 
132 

138 


187 80 
203 93 
216 105 


193 
201 

209 


347 
366 
381 


1.24 
142 
160 


259 
269 

277 


492 

518 
540 


183 
205 

229 


50 


1 
2 
3 


NA 
NA 
NA 


NA 
NA 
NA 


■•'•-24- 
31 

■"■■35 


85 
89 
94 


113 iiiii 

123 60 

131 ll|ifi 


124 
130 
136 


204 m$m 

218 100 
231 112 


188 
196 

205 


392 
408 
422 


139 

■158 
176 


252 
262 
271 


567 

588 
607 


iSMl:; 

255 


100 


1 

2 
3 


NA 
NA 
NA 


NA 
NA 
NA 


: '".30. 


84 
88 
93 


104 Mmm 

115 liflil 

124 67 


122 
127 
133 


200 89 
215 102 
228 135. 


182 

190 

: 199 


410 

425 
438 


151 
169 

, 188 . 


243 
253 
262 


617 
636 

654 


232 

■ 279 



Common Vent Capacity 


Vent 

Height 

H 




12 


19 


28 


38 


50 








Combined Appliance Input Rating in 


Thous< 


ands of Btu per 


Hour 








FAN 


FAN \ 


NAT 


FAN 


FAN 


NAT 


FAN 


FAN 


NAT 


FAN 


FAN 


NAT 


FAN 


FAN 


NAT 


(ft) 


+FAN 


+NAT 


!lliil 


+FAN 


+NAT 


am 


+FAN 


+NAT 


♦NAT 


+FAN 


+NAT 


+NAT 


+FAN 


+NAT 


ililll 


6 


NA 


NA ■ 


25 


NA 


118 


mmm 


NA 


176 


mmm. 


NA 


255 


102 


NA 


348 


lllli;l|:: 


8 


NA 


NA f 


28 


NA 


128 


i:-iiiiii 


NA 


190 


81 


NA 


276 


118 


NA 


380 


162 


10 


NA 


NA \ 


31 


NA 


136 


56 


NA 


205 


89 


NA 


295 


129 


NA 


405 


:liilllll 


15 


NA 


NA \ 


36 


NA 


NA 


iilill 


NA 


230 


1.05 


NA 


335 


150 


NA 


400 


lliilll 


20 


NA 


NA ! 


NA 


NA 


NA 


■,:.:n--- 


NA 


247 


120 


NA 


362 


170 


NA 


503 


240 


30 


NA 


NA ! 


NA 


NA 


NA 


mmm 


NA 


NA 


135 


NA 


398 


195 


NA 


558 


Hifii! 


50 


NA 


NA ; 


..NA 


NA 


NA 


§mm 


NA 


NA 


NA 


NA 


NA 


^■mmmi 


NA 


612 


325 


100 


NA 


NA i 


HA 


NA 


NA 


•NA". -. 


NA 


NA 


NA 


NA 


NA 


: mm§ 


NA 


NA 


tilili! 



For SI units, 1 in. = 25.4 mm, 1 in." = 645 mm", 1 ft. = 0.305 m, 1000 Btu per hr = 0.293 kW. 



92 



WATER HEATERS 



Table 5-17 continued 



Table 5-17 

Masonry Chimney [NFPA 54: Table 13.2(d)] (continued) 





Number of Appliances: Two or More 


Appliance Type: j Category 1 


Appliance Vent Connection: Single-Wall Metal Connector 


Vent Connector Capacity 


Vent 

Height 

H 

(ft) 


Connector 

Rise 

R 

(ft) 


Single-Wall Metal Vent Connector Diameter - D (in.) 


8 


9 


10 


Appliance Input Rating Limits in Thousands of Btu per Hour 


FAN 


NAT 


FAN NAT 


FAN 


NAT 


Min 


Max 


Max 


Min 


Max Max 


Min 


Max 


Max 


6 


1 

2 
3 


292 
301 
309 


366 

432 
491 


mmMum 

"231' 
269 


362 
373 
381 


474 m^mm-. 

557 299 
634 348 


499 
509 
519 


594 
696 
793 


\mmmm: 

376 

::':...'• 437/ :;....' 


8 


1 

2 
3 


313 

323 
332 


407 
465 
509 


.^:v'2tt7:--;- 

238 

\"274 ; 


387 
397 
407 


530 263 
607 309 

663 :#|;§fe:;il 


529 
540 
551 


672 
766 
838 


331 
39! 

450 


10 


1 

2 

'-> 
o 


333 

343 

352 


434 
489 
530 


L.:.. .21.3 ... 
■244'. ' 
: 279 . . 


410 
420 
430 


57i tmmMM 

640 317 
694 363 


558 
569 
580 


727 

813 

- 880 


343 

403 
459 


15 


1 

2 
3 


349 
359 
368 


502 
548 
586 


225 
256 
289 


445 
456 
466 


646 291 

706 WmMmm 

755 378 


623 
634 
646 


808 
884 
945 


366 

424- 
479 


20 


1 
2 
3 


345 
355 
365 


569 
610 
644 


235 
266 
298 


439 
450 
461 


734 m^m^m 

7S7 348 
. 831 391 


614 

627 
639 


921 

986 
1042 


443 
496 


30 


1 

2 
3 


338 
348 

358 


665 
699 

729 


250 

.282 
312 


430 

442 
452 


864 330 

908 fmBmm 

946 41-2 . 


600 
613 
626 


1089 
1145 
1193 


473 

524 


50 


1 

2 
3- 


328 
339 

349 


778 
806 
831 


287-' 

320 

■ 351,':; 


417 
429 
440 


1022 wsmmm 
loss llllllli 

1090 466 


582 
596 
610 


1302 
1346 
1386 


597 ■ 


100 


1 

2 
3 


315 

326 

337 


875 
899 
921 


328 
361 

392 


402 
415 

427 


1181 Pi;£!$$f;i 

1210 48B 

1238 W-mm 


560 

575 
589 


1537 
1570 
1604 


580 
634 
687 



Common Vent Capacity 


Vent 

Height 

H 


Minimum Internal Area of Masonry Chimney Flue (in. 2 ) 


63 


78 


113 


Combined Appliance Input Rating in Thousands of Btu per Hour 


FAN 


FAN 


NAT 


FAN 


FAN NAT 


FAN 


FAN 


NAT 


(ft) 


+FAN 


+NAT 


+NAT 


+FAN 


+nat m*wmM 


+FAN 


+NAT 


+NAT 


6 


NA 


455 


mw^m^mm 


NA 


579 m^m^m 


NA 


846 


'•;•:••• -Si A:- ;•;..: 


8 


NA 


497 


217 


NA 


633 Swilfei® 


1136 


928 


' 405 ■ j 


10 


NA 


532 


234 " 


771 


680 300 


1216 


1000 


450 


15 


677 


602 


280 


866 


772 . .360,... 


1359 


1139 


540 


20 


765 


661 


321 . 


947 


849 lf;iiilil| 


1495 


1264 


640 


30 


808 


739 


' -377 v . 


1052 


957 49(1 


1682 


1447 


740 


50 


NA 


821 


mmmm 


1152 


1076 600 


1879 


1672 


910 


100 


NA 


NA 


m$mm&, 


NA 


na sisi^iii 


2006 


1885 


1046 



For SI units, 1 in. = 25.4 mm, 1 in.- = 645 mm-, 1 ft. = 0.305 m, 1000 Btu per hr = 0.293 kW. 



93 



Table 5-18 -Table 5-19 



UNIFORM PLUMBING CODE 



Table 5-18 

Single- Wall Metal Pipe or Type B Asbestos Cement Vent [NFPA 54: Table 13.2(e)] 



Number of Appliances: 



Appliance Type: 



Appliance Vent Connection: 



Two or more 



Draft Hood-Equipment 



Direct to Pipe or Vent 



Vent Connector Capacity 








Total Vent Height 
H 


Connector 

Rise 

R 

(ft) 


Vent Connector Diameter- 0(in.) 


3 


4 5 6 7 


8 


(ft) 


Appliance Input Rating in Thousands of Btu per Hour 



6-8 



21 

28 
34 



40 
53 
61 



86 



102 
124 
147 



146 
178 
204 



205 

235 
275 



15 


1 


23 


44 


77 


117 


179 


240 




2 


30 


56 


92 


134 


194 


265 




3 


35 


64 


102 


155 


216 


298 


30 


1 


25 


49 


84 


129 


190 


270 


and up 


2 


31 


58 


97 


145 


211 


295 




3 


36 


68 


107 


164 


232 


321 





Common Vent Capacity 



Total Vent Height 
H 
(ft) 



Common Vent Diameter - D (in.) 



6 



8 



10 



12 



Combined Appliance Input Rating in Thousands of 
Btu per Hour 



6 




48 




78 




Ill 




155 




205 


320 


NA 


8 




55 




89 




128 




175 




234 


365 


505 


10 




59 




95 




136 




190 




250 


395 


560 


15 




71 




115 




168 




228 




305 


480 


690 


20 




80 




129 




186 




260 




340 


550 


790 


30 




NA 




147 




215 




300 




400 


650 


940 


50 




NA 




NA 




NA 




360 




490 


810 


1190 


For SI units, 1 in. 


= 25.4 


mm, 1 in.~ - 


= 645 


mm", 


1ft. 


= 0.305 m, 


1000 Btu r 


)er hr = 


= 0.293 kW 









Table 5-19 

Exterior Masonry Chimney [NFPA 54: Table 13.2(f)] 



Number of Appliances: 



Appliance Type: 



Appliance Vent Connection: 



Two or More 



NAT + NAT 



Type B Double-Wall Connector 



INTENDED USE: Combined Appliance Maximum Input Rating in Thousands of Btu per Hour 



Vent Height 


Internal Area of Chimney (in. 2 ) 


H 
(ft) 


12 


19 


28 


38 


50 


63 


78 


113 


6 


25 


46 


71 


103 


143 


188 


246 


NA 


8 


28 


53 


82 


119 


163 


218 


278 


408 


10 


31 


56 


90 


131 


177 


236 


302 


454 


15 


NA 


67 


106 


152 


212 


283 


365 


546 


20 


NA 


NA 


NA 


NA 


NA 


325 


419 


648 


30 


NA 


NA 


NA 


NA 


NA 


NA 


496 


749 


50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


922 


100 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 



For SI units, 1 in. = 25.4 mm, 1 in. 2 = 645 mm", 1 ft. = 0.305 m, 1000 Btu per hr = 0.293 kW. 



94 



WATER HEATERS 



Table 5-20 



Table 5-20 

Exterior Masonry Chimney [NFPA 54: Table 13.2(g)] 



Number of Appliances: 



Appliance Type: 



Appliance Vent Connection: 



Two or More 



NAT + NAT 



Type B Double-Wall Connector 



INTENDED USE: Minimum Allowable Input Rating of Space-Heating Appliance in Thousands of Btu per Hour 



Vent Height 


Internal Area of Chimney (in. 2 ) 


H 
(ft) 


12 


19 


28 


38 


50 


63 


78 


113 






Local 99% winter design temperature: 37°F or greater 








6 























NA 


8 


























10 


























15 


NA 























20 


NA 


NA 


NA 


NA 


NA 


184 








30 


NA 


NA 


NA 


NA 


NA 


393 


334 





50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


579 


100 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 






Local 99% winter design temperature: 


27°F to 36°F 








6 








68 


NA 


NA 


180 


212 


NA 


8 








82 


NA 


NA 


187 


214 


263 


10 





51 


NA 


NA 


NA 


210 


225 


265 


15 


NA 


NA 


NA 


NA 


NA 


253 


274 


305 


20 


NA 


NA 


NA 


NA 


NA 


307 


330 


362 


30 


NA 


NA 


NA 


NA 


NA 


NA 


445 


485 


50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


763 


100 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 






Local 99% winter design temperature: 


17°F to 26°F 








6 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


8 


NA 


NA 


NA 


NA 


NA 


NA 


264 


352 


10 


NA 


NA 


NA 


NA 


NA 


NA 


278 


358 


15 


NA 


NA 


NA 


NA 


NA 


NA 


331 


398 


20 


NA 


NA 


NA 


NA 


NA 


NA 


387 


457 


30 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


581 


50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


862 


100 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 






Local 99% 


winter 


design temperature 


: 5°F to 16°F 








6 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


8 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


10 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


430 


15 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


485 


20 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


547 


30 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


682 


50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


100 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 






Local 99% winter design temperature: 


4°F or lower 












Not recommended for any vent configurations 









For SI units, 1 in. = 25.4 mm, 1 in. 2 = 645 mm 2 , 1 ft. = 0.305 m, 1000 Btu per hr - 0.293 kW, °C = (°F - 32)/ 1.8. 
Note: See Figure G.2.4 for a map showing local 99 percent winter design temperatures in the United States. 



95 



Table 5-21 



UNIFORM PLUMBING CODE 



Table 5-21 

Exterior Masonry Chimney [NFPA 54: Table 13.2(h)] 



Number of Appliances: 



Appliance Type: 



Appliance Vent Connection: 



Two or More 



FAN + NAT 



Type B Double-Wall Connector 



INTENDED USE: Combined Appliance Maximum Input Rating in Thousands of Btu per Hour 



Vent Height 








Internal Area of Chimney (in. 2 ) 








H 
(ft) 


12 


19 


28 


38 


50 


63 


78 


113 


6 


74 


119 


178 


257 


351 ' 


458 


582 


853 


8 


80 


130 


193 


279 


384 


501 


636 


937 


10 


84 


138 


207 


299 


409 


538 


686 


1010 


15 


NA 


152 


233 


334 


467 


611 


781 


1156 


20 


NA 


NA 


250 


368 


508 


668 


858 


1286 


30 


NA 


NA 


NA 


404 


564 


747 


969 


1473 


50 


NA 


NA 


NA 


NA 


NA 


831 


1089 


1692 


100 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


1921 



For SI units, 1 in. = 25.4 mm, 1 in." = 645 mm", 1 ft. = 0.305 m, 1000 Btu per hr = 0.293 kW. 



96 



WATER HEATERS 



Table 5-22 



Table 5-22 

Exterior Masonry Chimney [NFPA 54: Table 13.2(i)] 











Number of Appliances: 


Two or More 






Appl 


ance Type: 


FAN + NAT 




Appliance Vent Connection: 


Type B Double-Wall Connector 


INTENDED USE; Minimum Allowable Input Rating of Space-Heating Appliance in Thousands of Btu per Hour 


Vent Height 








Internal Area of Chimney (in 


2 ) 






H 

(ft) 


12 


19 


28 




38 


50 


63 


78 


113 






Local 99% winter design temperature: 37°F or greatei 








6 




























8 




























10 




























15 


NA 

























20 


NA 


NA 


123 




190 


249 


184 








30 


NA 


NA 


NA 




334 


398 


393 


334 





50 


NA 


NA 


NA 




NA 


NA 


714 


707 


579 


100 


NA 


NA 


NA 




NA 


NA 


NA 


NA 


1600 






Local 99% 


winter design 


temperature: 


27 <r F to 36°F 








6 








68 




116 


156 


180 


212 


266 


8 








82 




127 


167 


187 


214 


263 


10 





51 


97 




141 


183 


210 


225 


265 


15 


NA 


111 


142 




183 


233 


253 


274 


305 


20 


NA 


NA 


187 




230 


284 


307 


330 


362 


30 


NA 


NA 


NA 




330 


319 


419 


445 


485 


50 


NA 


NA 


NA 




NA 


NA 


672 


705 


763 


100 


NA 


NA 


NA 




NA 


NA 


NA 


NA 


1554 






Local 99% 


winter design 


temperature: 


17°F to 26°F 








6 





55 


99 




141 


182 


215 


259 


349 


8 


52 


74 


111 




154 


197 


226 


264 


352 


10 


NA 


90 


125 




169 


214 


245 


278 


358 


15 


NA 


NA 


167 




212 


263 


296 


331 


398 


20 


NA 


NA 


212 




258 


316 


352 


387 


457 


30 


NA 


NA 


NA 




362 


429 


470 


507 


581 


50 


NA 


NA 


NA 




NA 


NA 


723 


766 


862 


100 


NA 


NA 


NA 




NA 


NA 


NA 


NA 


1669 






Local 99%; winter design temperature 


: 5°F to 16°F 








6 


NA 


78 


121 




166 


214 


252 


301 


416 


8 


NA 


94 


135 




182 


230 


269 


312 


423 


10 


NA 


111 


149 




198 


250 


289 


331 


430 


15 


NA 


NA 


193 




247 


305 


346 


393 


485 


20 


NA 


NA 


NA 




293 


360 


408 


450 


547 


30 


NA 


NA 


NA 




377 


450 


531 


580 


682 


50 


NA 


NA 


NA 




NA 


NA 


797 


853 


972 


100 


NA 


NA 


NA 




NA 


NA 


NA 


NA 


1833 






Local 99% winter design temperature 


-10°F to 4°F 








6 


NA 


NA 


145 




196 


249 


296 


349 


484 


8 


NA 


NA 


159 




213 


269 


320 


371 


494 


10 


NA 


NA 


175 




231 


292 


339 


397 


513 


15 


NA 


NA 


NA 




283 


351 


404 


457 


586 


20 


NA 


NA 


NA 




333 


408 


468 


528 


650 


30 


NA 


NA 


NA 




NA 


NA 


603 


667 


805 


50 


NA 


NA 


NA 




NA 


NA 


NA 


955 


1003 


100 


NA 


NA 


NA 




NA 


NA 


NA 


NA 


NA 






Local 99% 


winter design 


temperature: - 


11°F or lower 










Not recommended for 


any vent configurations 









For SI units, 1 in. = 25.4 mm, 1 in. 2 = 645 mm 2 , 1 ft. = 0.305 m, 1000 Btu per hr - 0.293 kW. 

Note: See Figure 5-13 for a map showing local 99 percent winter design temperatures in the United States. 



97 



Figures G. 1 (a) -G. 1(d) 



UNIFORM PLUMBING CODE 



PART! 



This is originally from NFPA 54, which contains addi- 
tional references from the UPC. 



Sizing of Venting Systems Serving Appliances 
Equipped with Draft Hoods, Category I Appliances, 
and Appliances Listed for Use with Type B Vents 



G.1 Examples Using Single Appliance Venting Tables. See Figure G.1(a) through Figure G.1(n). 



Vent cap 

TypeB 
double-wall ~ 
gas vent 




Table 5-8 is used when sizing Type B doubie-waH 
gas vent connected directly to the appliance. 

Note: The appliance can be either Category \ draft- 
hood-equipped or fan-assisted type. 

FIGURE G.l(a) T^pe B Double-Wall Vent System Serving a 
Single Appliance With a Type B Double-Wall Vent 



Tife-lined masonry - 
chimney 




Type B doubie-wall /fp 
gas vent used as - Ufr 
connector 



Table 5-10 is used when sizing a Type B double-wall gas 
vent connector attached to a tile-lined masonry chimney 

Notes: 

1 . A is the equivalent cross-sectionai area of the tile liner. 

2. The appliance can be either Category I draft-hood- 
equipped or fan-assisted type. 



FIGURE G. 1 (c) Vent System Serving a Single Appliance With a 
Masonry Qnmney and a Type B Double-Wall Vent Connecton 



Vent cap —H 



TypeB 
double-wait - 
gas vent 



±J 



Single-wall — * 
vent connector 



Table 5-9 is used when sizing a single-wall metal vent 
connector attached to a Type B double-wall gas vent. 

Note: The appliance can be either Category I draft- 
hood-equipped or fan-assisted type. 

FIGURE G,l(b) Type B Double-Wall Vent System Serving << 
Single Appliance With a Single-Wall Metal Vent Connector. 











i 




Tite-lined masonry — *- 
chimney 








\ 




! 


f 


i 


\ 


I 




Single-wall — U 
vent connector 


{ ♦ 

D 












\ 


< 




& 


I 


A 
















1 





Table 5-11 is used when sizing a single-wail vent 
connector attached to a tile-lined masonry chimney. 

Notes: 

1 . A is the equivalent cross-sectional area of the tile liner, 

2. The appliance can be either Category I draft-hood- 
equipped or fan-assisted type. 

FIGURE G. 1 (d) Vent System Serving a Single Appliance Using 
a Masonry Chimney and a Single-Wall Metal Vent Connector. 



98 



WATER HEATERS 



Figures G.1(e)-G. 1(h) 



I H —Vent cap 




Vent cap 



•Type B double-wall 
common vent 




Asbestos cement Type B or single-wall metal vent 
serving a single draft-hood-equipped appliance. 
(See Table 5-12) 

FIGURE C.l(e) Asbestos Cement Type B or Single-Wall 
Metal Vent System Serving a Single Draft-Hood-Equipped 
Appliance. 



Table 5-15 is used when sizing single-wall vent 
connectors attached to a Type B double-wall 
common vent. 

Note: Each appliance can be either Category I draft- 
hood-equipped or fan-assisted type. 

FIGURE G.l(g) Vent System Serving TWo or More Appli- 
ances with Type B Double-Mall Vent and Single-Wall Metal 
Vent Connectors. 



Vent cap 




Tile-lined masonry 
chimney 




Table 5-14 is used when sizing Type B double-wall 
gas vent connectors attached to a Type B double- 
wall common vent. 

Note: Each appliance can be either Category I draft- 
hood -equipped or fan-assisted type. 

FIGURE G. 1 (f) Vent System Serving Two or More Appliances 
with Type B Double-Wall Vent and Type B Double-Wall Vent 
Connectors. 



Table 5-16 is used when sizing Type B double-wall vent 
connectors attached to a tile-Mned masonry chimney. 

Notes: 

1. A is the equivalent cross-sectional area of the tile liner. 

2. Each appliance can be either Category I draft-hood- 
equipped or fan-assisted type. 

FIGURE G. 1 (h) Masonry Chimney Serving Two or More 
Appliances with Type B Double-Wall Vent Connectors. 



99 



Figures G.1(i)-G. 1(1) 



UNIFORM PLUMBING CODE 



Tile-lined masonry 
chimney 




r -i a 



Table 5-1 7 is used when sizing single-wall metal vent 
connectors attached to a tile-lined masonry chimney. 

Notes: 

1 . A is the equivalent cross-sectionai area of the tile liner. 

2. Each appliance can be either Category t draft - 
hood-equipped or fan-assisted type. 

FIGURE G. 1 (i) Masonry Chimney Serving Two or More 
Appliances with Single-Wall Metal Vent Connectors. 



Manifold common 
vent connector N 



-Lm- 



«i 



Connectors 






\L 



Example: Manifolded common vent connector Lm can 
be no greater than 18 times the common vent connector 
manifold inside diameter; that is, a 4 in. (100 mm) inside 
diameter common vent connector manifold should not 
exceed 72 in. (1800 mm) in length. 

Note: This is an illustration of a typical manifolded vent 
connector. Different appliance, vent connector, or 
common vent types are possible. 

FIGURE G. 1 (k) Use of Manifolded Common Vent Connector. 



See 511 .2.5 



^oH 



&> 



n 



-Vent cap 



£ 



*2 



Asbestos cement Type B or single-wall metal pipe vent 
serving two or more draft- hood-equipped appliances. 
(See Table 5-18 ) 

FIGURE G. 1 (j) Asbestos Cement Type B or Single-Wall Metal 
Vent System Serving Two or More Draft-Hood-Equipped Ap- 
pliances. 



See 51 1.2.5 



Common vent /^ 



frLo-'H 



-Vent cap 



nc 



Offset 



F— V 

Connectors \c 



£ 



Example: Offset common vent 

Note: This is an illustration of a typical offset vent. 
Different appliance, vent connector, or vent types are 
possible. 

FIGURE G.l (1) Use of Offset Common Vent 



100 



WATER HEATERS 



G.1.1 - Figure G.1(n) 



G.1.1 Example 1: Single Draft-Hood-Equipped 
Appliance. An installer has a 120,000-Btu/h input 
appliance with a five (5) inch diameter draft, hood 
outlet that needs to be vented into a ten (10) foot 
high Type B vent system. What size vent should be 
used assuming (1) a five (5) foot lateral single-wall 
metal vent connector is used with two (2) 90 degree 
elbows or (2) a five (5) foot lateral single-wall metal 
vent connector is used with three (3) 90 degree 
elbows in the vent system? See Figure G.1.1. 

Solution 

Table 5-9 should be used to solve this problem 
because single-wall metal vent connectors are being 
used with a Type B vent, as follows; 

(1) Read down the first column in Table 5-9 until 
the row associated with a ten (10) foot height 
and five (5) foot lateral is found. Read across this 
row until a vent capacity exceeding 120,000 
Btu/h is located in the shaded columns labeled 
NAT Max for draft-hood-equipped appliances. 
In this case, a five (5) inch diameter vent has a 
capacity of 122,000 Btu/h and can be used for 
this application. 

(2) If three (3) 90 degree elbows are used in the vent 
system, the maximum vent capacity listed in the 
tables must be reduced by 10 percent (see NFPA 
54:13.1.3). This implies that the five (5) inch 
diameter vent has an adjusted capacity of only 
110,000 Btu/h. In this case, the vent system must 



Vent connector Tee 




Tee same size as 
segment above 



Common vent size 

based on all inputs * 
entering this segment 
and available total height 



Total input - 



a^- 



Rise 



a 



X3 



Available total 
height H equals 
rise plus distance 
between tees 



Tee same 
jS size as 
segment 
above 



Btu/hr 
input 



*ffi 



Increase 
vent i 

connector T 
size if i 

necessary Other inputs 
from below 



Vent connector size 
depends on: 

• Input 

• Rise 

• Available total height H 

• Table 5-14 connectors 



Common vent size 
depends on: 

• Combined inputs 

• Available total height H 

• Table 5-14 common vent 



be increased to six (6) inches in diameter. See the 
following calculations: 

122,000 x 0.90 = 110,000 for five (5) inch vent 
From Table 5-10, select six (6) inch vent. 
186,000x0.90 = 167,000 

This figure is exceeding the required 
120,000. Therefore, use a six (6) inch vent and 
connector where three (3) elbows are used. 

G.1.2. Example 2: Single Fan-Assisted Appliance. 

An installer has an 80,000 Btu/h input fan-assisted 
appliance that must be installed using ten (10) feet of 
lateral connector attached to a thirty (30) foot high 
Type B vent. Two (2) 90 degree elbows are needed 
for the installation. Can a single-wall metal vent 
connector be used for this application? See Figure 
G.1.2. 

Solution 

Table 5-9 refers to the use of single-wall metal vent 
connectors with Type B vent. In the first column find 
the row associated with a thirty (30) foot height and 
a ten (10) foot lateral. Read across this row, looking 
at the FAN Min and FAN Max columns, to find that 



Use individual vent for top-floor 
appliance if connector 
requirement for rise or total 
height cannot be met 



Listed cap 



X- 



Use vent 
connector j 



Top-flocr— 
appliance 



Available total 
height for top- 
floor appliance 



45 



Available total 
height tor third- 
floor appliance 



Use vent 
connector 



^D 



Rise I 



Third-floor -*- 
appliance 



Available total 
height for second- 
floor appliance 



Use vent 
connector 
table 



Second-floor 
appliance -*> 



nr£) 



I 



Use available total 
height for top-fioor 

appliance and 
combined input of 
all appliances on 
common vent 



Third interconnection tee* 
--'■ 

Available total height 
for third-floor appliance 
and combined input of 
_three appliances 
{if top-floor appliance 
is not connected: 
measure total 
height to vent top} 

Second Interconnection 



Use available total 
height for .second-floor 
^"^"appSiance and combined 
heat input of two 



First interconnection tee" 



Design vent connector for 
first-floor appliance as an 
individual vent of this total 
height for input of first- 
floor appliance 



Tee with cap optional ~i 



First-floor -*~ 
appliance 



" Each interconnection tee is same size as 
segment oi common vent directly above 



FIGURE G.l(m) Multistory Gas Vent Design Procedure for 
Each Segment of System. 



FIGURE G,l(n) Principles of Design of Multistory Vents 
Using Vent Connector and Common Vent Design Tkbles. 



101 



G.1.2- Figure G.2.1 



UNIFORM PLUMBING CODE 



a three (3) inch diameter single-wall metal vent 
connector is not recommended. Moving to the next 
larger size single- wall connector (four (4) inch), we 
find that a four (4) inch diameter single-wall metal 
connector has a recommended maximum vent 
capacity of 144,000 Btu/h. The 80,000 Btu/h fan- 
assisted appliance is outside this range, so the 
conclusion is that a single-wall metal connector 
could be used to vent the appliance. Table 5-9 shows 
the acceptable range of vent capacities for a four (4) 
inch vent with five (5) feet of lateral to be between 
72,000 Btu/h and 157,000 Btu/h. 

If the appliance cannot be moved closer to the 
vertical vent, then a Type B vent could be used as the 
connector material. In this case, Table 5-8 shows that, 
for a thirty (30) foot high vent with ten (10) feet of 
lateral, the acceptable range of vent capacities for a 
four (4) inch diameter vent attached to a fan-assisted 
appliance is between 37,000 Btu/h and 150,000 
Btu/h. 



TypeB 
double-wall 
gas vent 



Elbow 




Draft hood- 
equipped appliance 
120,000-Btu/hr input 



For SI units, 1 ft = 0.305 m. 

FIGURE G.l.l Single Draft Hood-Equipped Appliance 
Example 1. 



G.1.3. Example 3: Interpolating Between Table 
Values. An installer has an 80,000 Btu/h input appli- 
ance with a four (4) inch diameter draft hood outlet 
that needs to be vented into a twelve (12) foot high 
Type B vent. The vent connector has a 5-foot lateral 
length and is also Type B vent. Can this appliance be 
vented using a four (4) inch diameter vent? 

Solution 

Table 5-8 is used in the case of an all Type B Vent 
system. However, since there is no entry in Table 5-8 
for a height of twelve (12) feet, interpolation must be 
used. Read down the four (4) inch diameter NAT 
Max column to the row associated with a ten (10) 
foot height and five (5) foot lateral to find the 
capacity value of 77,000 Btu/h. Read further down to 
the fifteen (15) foot height, five (5) foot lateral row to 
find the capacity value of 87,000 Btu/h. The differ- 
ence between the fifteen (15) foot height capacity 
value and the ten (10) foot height capacity value is 
10,000 Btu/h. The capacity for a vent system with a 
twelve (12) foot height is equal to the capacity for a 
ten (10) foot height plus two-fifths (2/5) of the differ- 
ence between the ten (10) foot and fifteen (15) foot 
height values, or 77,000 + 2/5 x 10,000 = 81,000 
Btu/h. Therefore, a four (4) inch diameter vent can 
be used in the installation. 

G.2 Examples Using Common Venting Tables. 
G.2.1 Example 4: Common Venting Two Draft- 
Hood-Equipped Appliances. A 35,000-Btu/h water 
heater is to be common vented with a 150,000 Btu/h 
furnace, using a common vent with a total height of 
thirty (30) feet. The connector rise is two (2) feet for 
the water heater with a horizontal length of four (4) 
feet. The connector rise for the furnace is three (3) feet 



30 ft 




For SI units, 1 ft = 0.305 m. 
FIGURE G. 1 .2 Single Fan-Assisted Appliance — Example 2. 



Combined capacity 
35,000+150,000 = 
185.000 Btu/hr 



Type B double- 
wail gas vent 




Single-wall 
connectors 



Draft hood- 
equipped 
water heater 
35,000 Btu/hr 
input 



Draft hood- 
equipped furnace 
150,000 Btu/hr 
input 



FIGURE G.2.1 Common Venting Two Draft Hood-Equipped 
Appliances — Example 4» 



102 



WATER HEATERS 



G.2.1 -Table G.2.3 



with a horizontal length of eight (8) feet. Assume 
single-wall metal connectors will be used with Type 
B vent. What size connectors and combined vent 
should be used in this installation? 

See Figure G.2.1. 

Solution 

Table 5-15 should be used to size single-wall 
metal vent connectors attached to Type B vertical 
vents. In the vent connector capacity portion of Table 
5-15, find the row associated with a thirty (30) foot 
vent height. For a two (2) foot rise on the vent 
connector for the water heater, read the shaded 
columns for draft-hood-equipped appliances to find 
that a three (3) inch diameter vent connector has a 
capacity of 37,000 Btu/h. Therefore, a three (3) inch 
single- wall metal vent connector can be used with 
the water heater. For a draft-hood-equipped furnace 
with a three (3) foot rise, read across the appropriate 
row to find that a five (5) inch diameter vent 
connector has a maximum capacity of 120,000 Btu/h 
(which is too small for the furnace), and a six (6) inch 
diameter vent connector has a maximum vent 
capacity of 172,000 Btu/h. Therefore, a six (6) inch 
diameter vent connector should be used with the 
150,000 Btu/h furnace. Since both vent connector 
horizontal lengths are less than the maximum 
lengths listed in Table 5-8, the table values can be 
used without adjustments. 

In the common vent capacity portion of Table 5- 
15, find the row associated with a thirty (30) foot 
vent height and read over to the NAT + NAT portion 
of the six (6) inch diameter column to find a 
maximum combined capacity of 257,000 Btu/h. Since 
the two (2) appliances total only 185,000 Btu/h, a six 
(6) inch common vent can be used. 

G.2.2 Example 5 (a): Common Venting a Draft- 
Hood-Equipped Water Heater with a Fan-Assisted 
Furnace into a Type B Vent. In this case, a 35,000- 
Btu/h input draft-hood-equipped water heater with a 
four (4) inch diameter draft hood outlet, two (2) feet 
of connector rise, and four (4) feet of horizontal 
length is to be common vented with a 100,000 Btu/h 
fan-assisted furnace with a four (4) inch diameter flue 
collar, three (3) feet of connector rise, and six (6) feet 
of horizontal length. The common vent consists of a 
thirty (30) foot height of Type B vent. What are the 
recommended vent diameters for each connector and 
the common vent? The installer would like to use a 
single-wall metal vent connector. See Figure G.2.2. 

Solution (See Table 5-15) 

Water Heater Vent Connector Diameter. Since the 
water heater vent connector horizontal length of four 
(4) feet is less than the maximum value listed in 
Table 5-15, the venting table values can be used 



Combined capacity 

35,000 4-100,000- 
135,000 Btu/hr 



Type 8 

double-wall 

gas vent 30 ft 




For Si units, 



0.305 m. 



FIGURE G.%2 Common Venting a Draft Hood-Equipped 
Water Heater with a Fan-Assisted Furnace into a Tppe B 
Double-Wall Common Vent — Example 5(a), 

TABLE G.2.3 

Masonry Chimney Liner Dimensions with Circular 

Equivalents 







Inside 






Inside 


Diameter 




Nominal 


Dimensions < 


3r Equivalent 


Equivalent 


Liner Size of Liner 


Diameter 


Area 


(in.) 


(in.) 


(in.) 


(in. 2 ) 


4x8 


2-1/2x6-1/2 


4.0 


12.2 






5.0 


19.6 






6.0 


28.3 






7.0 


38.3 


8x8 


6-3/4x6-3/4 


7.4 


42.7 






8.0 


50.3 


8x12 


6-1/2x10-1/2 


9.0 


63.6 






10.0 


78.5 


12x12 


9-3/4x9-3/4 


10.4 


83.3 






11.0 


95.0 


12x16 


9-1/2x13-1/2 


11.8 


107.5 






12.0 


113.0 






14.0 


153.9 


16x16 


13-1/4x13-1/4 


14.5 


162.9 






15.0 


176.7 


16x20 


13x17 


16.2 


206.1 






18.0 


254.4 


20x20 


16-3/4x16-3/4 


18.2 


260.2 






20.0 


314.1 


20x24 


16-1/2x20-1/2 


20.1 


314.2 






22.0 


380.1 


24x24 


20-1/4x20-1/4 


22.1 


380.1 






24.0 


452.3 


24x28 


20-1/4x24-1/4 


24.1 


456.2 


28x28 


24-1/4x24-1/4 


26.4 


543.3 






27.0 


572.5 


30x30 


25-1/2x25-1/2 


27.9 


607.0 


30x36 


25-1/2x31-1/2 


30.9 


749.9 






33.0 


855.3 


36x36 


31-1/2x31-1/2 


34.4 


929.4 






36.0 


1017.9 



For SI units, 1 in. = 25.4 mm, 1 in." = 645 mm\ 

Note: When liner sizes differ dimensionally from those shown in this 
table, equivalent diameters can be determined from published tables for 
square and rectangular ducts of equivalent carrying capacity or by 
other engineering methods. 



103 



G.2.2-G.2.3 



UNIFORM PLUMBING CODE 



without adjustment. Using the Vent Connector 
Capacity portion of Table 5-15, read down the Total 
Vent Height (H) column to thirty (30) feet and read 
across the two (2) feet Connector Rise (R) row to the 
first Btu/h rating in the NAT Max column that is 
equal to or exceeding the water heater input rating. 
The table shows that a three (3) inch vent connector 
has a maximum input rating of 37,000 Btu/h. 
Although this rating is exceeding the water heater 
input rating, a three (3) inch vent connector is 
prohibited by Section 511.1.1(5). A four (4) inch vent 
connector has a maximum input rating of 67,000 
Btu/h and is equal to the draft hood outlet diameter. 
A four (4) inch vent connector is selected. Since the 
water heater is equipped with a draft hood, there are 
no minimum input rating restrictions. 

Furnace Vent Connector Diameter. Using the Vent 
Connector Capacity portion of Table 5-15, read down 
the Total Vent Height (H) column to thirty (30) feet 
and across the three (3) foot Connector Rise (R) row. 
Since the furnace has a fan-assisted combustion 
system, find the first FAN Max column with a Btu/h 
rating exceeding the furnace input rating. The four 
(4) inch vent connector has a maximum input rating 
of 119,000 Btu/h and a minimum input rating of 
85,000 Btu/h. 

The 100,000-Btu/h furnace in this example falls 
within this range, so a four (4) inch connector is 
adequate. Since the furnace vent connector hori- 
zontal length of six (6) feet is less than the maximum 
value listed in Table 5-8, the venting table values can 
be used without adjustment. If the furnace had an 
input rating of 80,000 Btu/h, then a Type B vent 
connector would be needed in order to meet the 
minimum capacity limit, (see Table 5-14) 

Common Vent Diameter. The total input to the 
common vent is 135,000 Btu/h. Using the Common 
Vent Capacity portion of Table 5-15, read down the 
Vent Height (H) column to thirty (30) feet and across 
this row to find the smallest vent diameter in the 
FAN + NAT column that has a Btu/h rating equal to 
or exceeding 135,000 Btu/h. The four (4) inch 
common vent has a capacity of 132,000 Btu/h and 
the five (5) inch common vent has a capacity of 
202,000 Btu/h. Therefore, the five (5) inch common 
vent should be used in this example. 
Summary: In this example, the installer can use a 
four (4) inch diameter, single-wall metal vent 
connector for the water heater and a four (4) inch 
diameter, single-wall metal vent connector for the 
furnace. The common vent should be a five (5) inch 
diameter Type B vent. 

G.2.3 Example 5 (b): Common Venting into an Inte- 
rior Masonry Chimney. In this case, the water heater 
and fan-assisted furnace of Example 5(a) are to be 
common-vented into a clay-tile-lined masonry 
chimney with a thirty (30) foot height. The chimney 



is not exposed to the outdoors below the roof line. 
The internal dimensions of the clay tile liner are 
nominally eight (8) inches x twelve (12) inches. 
Assuming the same vent connector heights, laterals, 
and materials found in example 5(a), what are the 
recommended vent connector diameters, and is this 
an acceptable installation? 

Solution 

Table 5-17 is used to size common venting installa- 
tions involving single-wall connectors into masonry 
chimneys. 

Water Heater Vent Connector Diameter. Using 
Table 5-17, Vent Connector Capacity, read down the 
Vent Height (H) column to thirty (30) feet, and read 
across the two (2) foot Connector Rise (R) row to the 
first Btu/h rating in the NAT Max column that is 
equal to or exceeding the water heater input rating. 
The table shows that a three (3) inch vent connector 
has a maximum input of only 31,000 Btu/h, while a 
four (4) inch vent connector has a maximum input of 
57,000 Btu/h. A four (4) inch vent connector must 
therefore be used. 

Furnace Vent Connector Diameter. Using the Vent 
Connector Capacity portion of Table 5-17, read down 
the total Vent Height (H) column to thirty (30) feet 
and across the three (3) feet Connector Rise (R) row. 
Because the furnace has a fan-assisted combustion 
system, find the first FAN Max column with a Btu/h 
rating exceeding the furnace input rating. The four 
(4) inch vent connector has a maximum input rating 
of 127,000 Btu/h and a minimum input rating of 
95,000 Btu/h. The 100„000 Btu/h furnace in this 
example falls within this range, so a four (4) inch 
connector is adequate. 

Masonry Chimney. From Table G.2.3, the equiva- 
lent area for a nominal liner size of eight (8) inches x 
twelve (12) inches is sixty-three and six-tenths (63.6) 
of a square inch. Using Table 5-17, Common Vent 
Capacity, read down the FAN + NAT column under 
the Minimum Internal Area of Chimney value of 
sixty-three (63) to the row for thirty (30) foot height 
to find a capacity value of 739,000 Btu/h. The 
combined input rating of the furnace and water 
heater, 135,000 Btu/h, is less than the table value so 
this is an acceptable installation. 
Section 511.1.8 requires the common vent area to not 
exceed seven (7) times the smallest listed appliance 
categorized vent area, flue collar area, or draft hood 
outlet area. Both appliances in this installation have 
four (4) inch diameter outlets. From Table G.2.3, the 
equivalent area for an inside diameter of four (4) 
inches is twelve and two-tenths (12.2) of a square 
inch. Seven (7) times twelve and two-tenths (12.2) 
equals eighty-five and four-tenths (85.4), which is 
exceeding sixty-three and six-tenths (63.6), so this 
configuration is acceptable. 



104 



WATER HEATERS 



G.2.4-J.1 



G.2.4 Example 5 (c): Common Venting into an 
Exterior Masonry Chimney. In this case, the water 
heater and fan-assisted furnace of Examples 5(a) and 
5(b) are to be common-vented into an exterior 
masonry chimney. The chimney height, clay-tile- 
liner dimensions, and vent connector heights and 
laterals are the same as in Example 5(b). This system 
is being installed in Charlotte, North Carolina. Does 
this exterior masonry chimney need to be relined? If 
so, what corrugated metallic liner size is recom- 
mended? What vent connector diameters are recom- 
mended? See Table G.2.3 and Figure 5-14. 
Solution 

According to 511.2.17, Type B vent connectors 
are required to be used with exterior masonry chim- 
neys. Use Table 5-21 and Table 5-22 to size 
FAN+NAT common venting installations involving 
Type-B double-wall connectors into exterior 
masonry chimneys. 

The local 99 percent winter design temperature 
needed to use Table 5-21 and Table 5-22 can be found 
in the ASHRAE Handbook - Fundamentals. For Char- 
lotte, North Carolina, this design temperature is 19°F 
(-7.22°C), 

Chimney Liner Requirement. As in Example 5 (b), 
use the sixty-three (63) square inch column of Table 
5-21 to the thirty (30) foot height row to find that the 
combined appliance maximum input is 747,000 
Btu/h. The combined input rating of the appliance in 
this installation, 135,000 Btu/h, is less than the 
maximum value, so this criterion is satisfied. Table 5- 
22, at a 19°F (-7.22°C) design temperature, and at the 
same vent height and internal area used earlier, 
shows that the minimum allowable input rating of a 
space-heating appliance is 470,000 Btu/h. The 
furnace input rating of 100,000 Btu/h is less than this 
minimum value. So this criterion is not satisfied, and 
an alternative venting design needs to be used, such 
as a Type B vent shown in Example 5(a) or a listed 
chimney liner system shown in the rest of the 
example. 

According to Section 511.2.19, Table 5-9 or 
Tables 5-14 or 5-15 are used for sizing corrugated 
metallic liners in masonry chimneys, with the 
maximum common vent capacities reduced by 20 
percent. This example will be continued assuming 
Type B vent connectors. 

Water Heater Vent Connector Diameter. Using 
Table 5-14 Connector Capacity, read down the total 
Vent Height (H) column to thirty (30) feet, and read 
across the two (2) foot Connector Rise (R) row to the 
first Btu/hour rating in the NAT Max column that is 
equal to or exceeding the water heater input rating. 
The table, shows that a three (3) inch vent connector 



has a maximum capacity of 39,000 Btu/h. Although 
this rating is exceeding the water heater input rating, 
a three (3) inch vent connector is prohibited by 
511.1.6. A four (4) inch vent connector has a 
maximum input rating of 70,000 Btu/h and is equal 
to the draft hood outlet diameter. A four (4) inch 
vent connector is selected. 

Furnace Vent Connector Diameter. Using Table 5- 
14, Vent Connector Capacity, read down the total 
Vent Height (H) column to thirty (30) feet, and read 
across the three (3) foot Connector Rise (R) row to 
the first Btu/h rating in the FAN MAX column that 
is equal to or exceeding the furnace input rating. The 
100,000 Btu/h furnace in this example falls within 
this range, so a four (4) inch connector is adequate. 

Chimney Liner Diameter. The total input to the 
common vent is 135,000 Btu/h. Using the Common 
Vent Capacity portion of Table 5-14, read down the 
total Vent Height (H) column to thirty (30) feet and 
across this row to find the smallest vent diameter in 
the FAN + NAT column that has a Btu/h rating 
exceeding 135,000 Btu/h. The four (4) inch common 
vent has a capacity of 138,000 Btu/h. Reducing the 
maximum capacity by 20 percent (see 13.2.19) results 
in a maximum capacity for a four (4) inch corrugated 
liner of 110,000 Btu/h, less than the total input of 
135,000 Btu/h. So a larger liner is needed. The five 
(5) inch common vent capacity listed in Table 5-14 is 
210,000 Btu/h, and after reducing by 20 percent is 
168,000 Btu/h. Therefore, a five (5) inch corrugated 
metal liner should be used in this example. 

Single Wall Connectors. Once it has been estab- 
lished that relining the chimney is necessary, Type B 
double-wall vent connectors are not specifically 
required. This example could be redone using Table 
5-15 for single-wall vent connectors. For this case, the 
vent connector and liner diameters would be the 
same as found for Type B double-wall connectors. 

The following is originally from NFPA 54, which 
contains additional reference. 

Example of Combination of Indoor and Outdoor 
Combustion and Ventilation Opening Design. 

J.1 Example of Combination Indoor and Outdoor 
Combustion Air Opening. Determine the required 
combination of indoor and outdoor combustion air 
opening sizes for the following appliance installation 
example. 

Example Installation: A fan-assisted furnace and a 
draft-hood-equipped water heater with the following 
inputs are located in a fifteen (15) foot x thirty (30) 
foot basement with an eight (8) foot ceiling. No addi- 



105 



J.1 - Table A.9.3.2.1 



UNIFORM PLUMBING CODE 



tional indoor spaces can be used to help meet the 

appliance combustion air needs. 

Fan- Assisted Furnace Input: 100,000 Btu/h 

Draft-Hood-Equipped Water Heater Input: 40,000 
Btu/h 

Solution 



TABLE A.9.3.2.1 
Standard Method Volume, All Appliances 



(1) 



(2) 



(3) 



Determine the total available room volume: 

Equipment room volume: 

Fifteen (15) feet x thirty (30) feet with an eight (8) 

foot ceiling = thirty-six-hundred (3,600) cubic 

feet 

Determine the total required volume: The standard 

method to determine combustion air will be 

used to calculate the required volume. 

The combined input for the appliances located in 

the basement is calculated as follows: 

100,000 Btu/h +40,000 Btu/h = 140,000 Btu/h 

The Standard Method requires that the required 

volume be determined based on fifty (50) cubic 

feet per 1,000 Btu/hour. 

Using Table A.9.3.2.1, the required volume for a 

140,000 Btu/h water heater is seven-thousand 

(7,000) cubic feet. 

Conclusion: Indoor volume is insufficient to 
supply combustion air since the total of thirty-six- 
hundred (3,600) cubic feet does not meet the 
required volume of seven-thousand (7,000) cubic 
feet. Therefore, additional combustion air must 
be provided from the outdoors. 
Determine ratio of the available volume to the 
required volume: 

3,600 ft. 3 



7000 ft. 3 



0.51 



(4) Determine the reduction factor to be used to 
reduce the full outdoor air opening size to the 
minimum required based on ratio of indoor spaces: 

1.00 - 0.51 (from Step 3) = 0.49 

(5) Determine the single outdoor combustion air 
opening size as if combustion air is to come from 
outdoors. In this example, the combustion air 
opening directly communicates with the outdoors. 



140,000 Btu/h 



:47in. 2 



(6) 



3,000 Btu/ in. 2 

Determine the minimum outdoor combustion 

air opening area: 

Outdoor opening area = 0.49 
(from Step 4) x 47 in. 2 = 23 in. 2 

Section 507.3 requires the minimum dimension 

of the air opening shall be not less than three (3) 

inches. 



Appliance Input 


Required Volume 


(Btu/h) 


(ft. 3 ) 


5,000 


250 


10,000 


500 


15,000 


750 


20,000 


1,000 


25,000 


1,250 


30,000 


1,500 


35,000 


1,750 


40,000 


2,000 


45,000 


2,250 


50,000 


2,500 


55,000 


2,750 


60,000 


3,000 


65,000 


3,250 


70,000 


3,500 


75,000 


3,750 


80,000 


4,000 


85,000 


4,250 


90,000 


4,500 


95,000 


4,750 


100,000 


5,000 


105,000 


5,250 


110,000 


5,500 


115,000 


5,750 


120,000 


6,000 


125,000 


6,250 


130,000 


6,500 


135,000 


6,750 


140,000 


7,000 


145,000 


7,250 


150,000 


7,500 


160,000 


8,000 


170,000 


8,500 


180,000 


9,000 


190,000 


9,500 


200,000 


10,000 


210,000 


10,500 


220,000 


11,000 


230,000 


11,500 


240,000 


12,000 


250,000 


12,500 


260,000 


13,000 


270,000 


13,500 


280,000 


14,000 


290,000 


14,500 


300,000 


15,000 



507.4.1 See Figure 5-8 • 507.4.1(1) See Figure 5-9 and Figure 5- 
10 • 507.4.1(2) See Figure 5-11 • 507.4.2 See Figure 5-12 



106 



CHAPTER 6 

WATER SUPPLY AND DISTRIBUTION 



| 601.0 Hot and Cold Water Required. 

601 .1 Except where not deemed necessary for safety 
or sanitation by the Authority Having Jurisdiction, 
each plumbing fixture shall be provided with an 
adequate supply of potable running water piped 
thereto in an approved manner, so arranged as to 
flush and keep it in a clean and sanitary condition 
without danger of backflow or cross-connection. 
Water closets and urinals shall be flushed by means 
of an approved flush tank or flushometer valve. 

Exception: Listed fixtures that do not require 
water for their operation and are not connected 
to the water supply. 

In occupancies where plumbing fixtures are 
installed for private use, hot water shall be required 
for bathing, washing, laundry, cooking purposes, 
dishwashing or maintenance. In occupancies where 
plumbing fixtures are installed for public use, hot 
water shall be required for bathing and washing 
purposes. This requirement shall not supersede the 
requirements for individual temperature control 
limitations for public lavatories, bathtubs, whirlpool 
bathtubs and shower control valves. 

601.2 Identification of a Potable and Nonpotable 
Water System. In buildings where potable water 
and nonpotable water systems are installed, each 
system shall be clearly identified in accordance with 

I Sections 60 1.2.1. through 601.2.4. 

601 .2.1 Potable Water. Green background with 
white lettering. 

601.2.2 Color and Information. Each system 
shall be identified with a colored pipe or band 
and coded with paints, wraps and materials 
compatible with the piping. 

Except as required in Sections 1610.0 and 
1617.0, nonpotable water systems shall have a 
yellow background with black uppercase 
lettering, with the words "CAUTION: 
NONPOTABLE WATER, DO NOT DRINK." 
Each nonpotable system shall be identified to 
designate the liquid being conveyed, and the 
direction of normal flow shall be clearly shown. 
The minimum size of the letters and length of 
the color field shall conform to Table 6-1. 

The background color and required infor- 
mation shall be indicated every twenty (20) feet 
(6,096 mm) but not less than once per room, and 
shall be visible from the floor level. 

601.2.3 Fixtures. Where vacuum breakers or 
backflow preventers are installed with fixtures 



listed in Table 14-1, identification of the 
discharge side shall be permitted to be omitted. 

601.2.4 Outlets. Each outlet on the nonpotable 
water line that is used for special purposes shall 
be posted with black uppercase lettering as 
follows: "CAUTION: NONPOTABLE WATER, 
DO NOT DRINK/' 

601 .3 Faucets and diverters shall be connected to the 
water distribution system so that hot water corre- 
sponds to the left side of the fittings. 

TABLE 6-1 
Minimum Length of Color Field and Size of Letters 



Outside Diameter of 
Pipe or Covering 



inches 



(mm) 



Minimum 

Length 

of Color Field 

inches (mm) 



Minimum Size 
of Letters 

inches (mm) 



1/2 to 1-1/4 (15 to 32) 8 (203) 1/2 (12.7) 

1-1/2 to 2 (40 to 50) 8 (203) 3/4 (19.1) 

2-1/2 to 6 (65 to 150) 12 (305) 1-1/4 (32) 

8 to 10 (200 to 250) 24 (610) 2-1/2 (64) 

Over 10 (Over 250) 32 (813) 3-1/2 (89) 

602.0 Unlawful Connections. 

602.1 No installation of potable water supply piping 
or part thereof shall be -made in such a manner that it 
will be possible for used, unclean, polluted, or 
contaminated water, mixtures, or substances to enter 
any portion of such piping from any tank, receptor, 
equipment, or plumbing fixture by reason of back- 
siphonage, suction, or any other cause, either during 
normal use and operation thereof, or when any such 
tank, receptor, equipment, or plumbing fixture is 
flooded or subject to pressure exceeding the oper- 
ating pressure in the hot or cold water piping. 

602.2 No person shall make a connection or allow 
one (1) to exist between pipes or conduits carrying 
domestic water supplied by any public or private 
water service system, and any pipes, conduits, or 
fixtures containing or carrying water from any 
other source or containing or carrying water that 
has been used for any purpose whatsoever, or any 
piping carrying chemicals, liquids, gases, or any 
substances whatsoever, unless there is provided a 
backflow prevention device approved for the 
potential hazard and maintained in accordance 
with this code. Each point of use shall be separately 
protected when potential cross-contamination of 
individual units exists. 



107 



Table 6-2 



UNIFORM PLUMBING CODE 



TABLE 6-2 

Backflow Prevention Devices, Assemblies and Methods 

Degree of Hazard 



Device, Assembly, 
or Method 1 


Applicable 
standards 


Pollution 
(Low Hazard) 


Contamination 
(High Hazard) 


Installation 23 






Back- 
Siphonage 


Back- 
Pressure 


Back- 
Siphonage 


Back- 
Pressure 




Airgap 


ASME 
A112.1.2 


X 




X 




See Table 6-3 in this 
chapter. 


Air gap fittings for 
use with plumbing 
fixtures, appliances 
and appurtenances 


ASME 
A112.1.3 


X 




X 




Air gap fitting is a device 
with an internal air gap and 
typical installation includes 
plumbing fixtures, appli- 
ances and appurtenances. 
The critical level shall not 
be installed below the flood 
level rim. 


Atmospheric- type 
vacuum breaker 
(consists of a body, 
checking member 
and atmospheric 
port) 


ASSE 1001 
or CSA B 
64.1.1 


X 




X 




Upright position. No valve 
downstream. Minimum of 
six (6) inches (152 mm) or 
listed distance above all 
downstream piping and 
flood-level rim of receptor. 4 '^ 


Antisiphon fill valve 
(ballcocks) for gravity 
water closet flush 
tanks and urinal 
tanks 


ASSE 1002 
or CSA B 
125.3 


X 




X 




Installation on gravity 
water closet flush tank and 
urinal tanks with the fill 
valve installed with the crit- 
ical level not less than one 
(1) inch (25.4 mm) above 
the opening of the overflow 
pipe. 4 - 5 


Vacuum breaker 
wall hydrants, hose 
bibbs, frost resistant, 
automatic draining 
type 


ASSE 1019 
or CSA B 
64.2.1.1 


X 




X 




Installation includes wall 
hydrants and hose bibbs. 
Such devices are not for use 
under continuous pressure 
conditions (means of shut- 
off downstream of device is 
prohibited). 4,5 


Backflow preventer 
for Carbonated 
Beverage Dispensers 
(two independent 
check valves with a 
vent to the atmo- 
sphere) 


ASSE 1022 


X 








Installation includes carbon- 
ated beverage machines or 
dispensers. These devices 
operate under intermittent 
or continuous pressure 
conditions. 



108 



WATER SUPPLY AND DISTRIBUTION 



Table 6-2 continued 



TABLE 6-2 
Backflow Prevention Devices, Assemblies and Methods (continued) 



Degree of Hazard 



Device, Assembly, 
or Method 1 


Applicable 
standards 


Pollution 
(Low Hazard) 


Contamination 
(High Hazard) 


Installation 23 






Back- 
Siphonage 


Back- 
Pressure 


Back- 
Siphonage 


Back- 
Pressure 




Spill-Resistant 
Pressure-Type 
Backflow Preven- 
tion Assembly 
(single check valve 
with air inlet vent 
and means of field 
testing) 


ASSE 1056 


X 




X 




Upright position. Minimum of six 
(6) inches (152 mm) or listed 
distance above all downstream 
piping and flood-level rim of 
receptor." 1 


Double Check 
Valve Backflow 
Prevention Assem- 
bly (two indepen- 
dent check valves 
and means of field 


ASSE 1015; 

AWWA 

C510;CSA 

B 64.5 or 

CSAB 

64.5.1 


X 


X 






Horizontal unless otherwise 
listed. Requires one (1) foot (305 
mm) clearance at bottom for 
maintenance. May need plat- 
form/ ladder for test and repair. 
Does not discharge water. 


testing) 


ASSE 1048 


X 


X 






Horizontal unless otherwise listed. 
Requires one (1) foot (305 mm) 
clearance at bottom for mainte- 
nance. May need platform/ ladder 
for test and repair. Does not 
discharge water. Installation 
includes a fire protection system 
and is designed to operate under 
continuous pressure conditions. 


Pressure Vacuum 
Breaker Backflow 
Prevention 
Assembly (loaded 
air inlet valve, 
internally loaded 
check valve and 
means of field 
testing) 


ASSE 1020 
or CSA B 
64.1.2 


X 




X 




Upright position. May have 
valves downstream. Minimum of 
twelve (12) inches (305 mm) 
above all downstream piping and 
flood-level rim of receptor. May 
discharge water. 


Reduced Pressure 
Principle Back- 
flow Prevention 
Assembly (two 
independently 
acting loaded 
check valves, a 
pressure relief 
valve and means 
of field testing) 


ASSE 1047 


X 


X 


X 


X 


Horizontal unless otherwise 
listed. Requires one (1) foot (305 
mm) minimum clearance at 
bottom for maintenance. May 
need platform /ladder for test and 
repair. May discharge water. 
Installation includes a fire pro- 
tection system and is designed to 
operate under continuous pres- 
sure conditions. 




ASSE 1013; 

AWWA 

C511;CSA 

B64.4 or 

CSAB 

64.4.1 


X 


X 


X 


X 


Horizontal unless otherwise listed. 
Requires one (1) foot (305 mm) 
minimum clearance at bottom for 
maintenance. May need plat- 
form/ladder for test and repair. 
May discharge water. 



See description of devices and assemblies in this chapter. 
" Installation in pit or vault requires previous approval by the Authority Having Jurisdiction. 
Refer to general and specific requirement for installation. 

Not to be subjected to operating pressure for more than twelve (12) hours in any twenty-four (24) hour period. 
For deck-mounted and equipment-mounted vacuum breaker, see Section 603.4.15. 



109 



Table 6-3 -603.1 



UNIFORM PLUMBING CODE 



TABLE 6-3 
Minimum Airgaps for Water Distribution 4 



Fixtures 


When not affected 
by sidewalls 1 
Inches (mm) 


When affected by 
sidewall 2 
Inches (mm) 


Effective openings 3 not greater 
than one-half (1/2) inch (12.7 mm) 
in diameter 


1 (25.4) 


1-1/2 (38) 


Effective openings 3 not greater 
than three-quarters (3/4) inch 
(19.1 mm) in diameter 


1-1/2 (38) 


2-1/4 (57) 


Effective openings 3 not greater 
than one (1) inch (25.4 mm) in 
diameter 


2 (51) 


3 (76) 


Ef fective openings 3 greater than 
one (1) inch (25.4 mm) in diameter 


Two (2) times 

diameter of 

effective opening 


Three (3) times 

diameter of 

effective opening 



1 Sidewalls, ribs, or similar obstructions do not affect airgaps when spaced from the inside edge of the spout opening a distance 
exceeding three (3) times the diameter of the effective opening for a single wall, or a distance exceeding four (4) times the effective 
opening for two (2) intersecting walls. 

2 Vertical walls, ribs, or similar obstructions extending from the water surface to or above the horizontal plane of the spout opening 
other than specified in Note 1 above. The effect of three (3) or more such vertical walls or ribs has not been determined. In such 
cases, the airgap shall be measured from the top of the wall. 

° The effective opening shall be the minimum cross-sectional area at the seat of the control valve or the supply pipe or tubing that 
feeds the device or outlet. If two (2) or more lines supply one outlet, the effective opening shall be the sum of the cross-sectional 
areas of the individual supply lines or the area of the single outlet, whichever is smaller. 

4 Airgaps less than one (1) inch (25.4 mm) shall be approved only as a permanent part of a listed assembly that has been tested 
under actual backflow conditions with vacuums of zero (0) to twenty-five (25) inches (635 mm) of mercury. 



602.3 No plumbing fixture, device, or construction 
shall be installed or maintained or shall be connected 
to any domestic water supply when such installation 
or connection provides a possibility of polluting such 
water supply or cross-connection between a 
distributing system of water for drinking and 
domestic purposes and water that becomes contami- 
nated by such plumbing fixture, device, or construc- 
tion unless there is provided a backflow prevention 
device approved for the potential hazard. 

602.4 No water piping supplied by any private 
water supply system shall be connected to any other 
source of supply without the approval of the 
Authority Having Jurisdiction, Health Department, 
or other department having jurisdiction. 

603.0 Cross-Connection Control. 

Cross-connection control shall be provided in accor- 
dance with the provisions of this chapter. 

No person shall install any water-operated 
equipment or mechanism, or use any water-treating 



chemical or substance, if it is found that such equip- 
ment, mechanism, chemical, or substance causes 
pollution or contamination of the domestic water 
supply. Such equipment or mechanism shall be 
permitted only when equipped with an approved 
backflow prevention device or assembly. 

603.1 Approval of Devices or Assemblies. Before 
any device or assembly is installed for the prevention 
of backflow, it shall have first been approved by the 
Authority Having Jurisdiction. Devices or assemblies 
shall be tested for conformity with recognized stan- 
dards or other standards acceptable to the Authority 
Having Jurisdiction. Backflow prevention devices 
and assemblies shall comply with Table 6-2, except 
for specific applications and provisions as stated in 
Sections 603.4 through 603.4.22. 

Devices or assemblies installed in a potable 
water supply system for protection against backflow 
shall be maintained in good working condition by 
the person or persons having control of such devices 
or assemblies. Such devices or assemblies shall be 
tested at the time of installation, repair, or relocation 



110 



WATER SUPPLY AND DISTRIBUTION 



603.1 -603.3 



and not less than on an annual schedule thereafter, 
or more often when required by the Authority 
Having Jurisdiction. If found to be defective or inop- 
erative, the device or assembly shall be repaired or 
replaced. No device or assembly shall be removed 
from use or relocated or other device or assembly 
substituted, without the approval of the Authority 
Having Jurisdiction. 

Testing shall be performed by a certified back- 
flow assembly tester. 

603.2 Backflow Prevention Devices, Assemblies, 
and Methods. 

603.2.1 Airgap. The minimum airgap to afford 
backflow protection shall be in accordance with 
Table 6-3. 

603.2.2 Atmospheric Vacuum Breaker (AVB). 

An atmospheric vacuum breaker consists of a 
body, a checking member, and an atmospheric 
| port. 

603.2.3 Hose Connection Backflow Preventer. 

A hose connection backflow preventer consists of 
two (2) independent check valves with an indepen- 
dent atmospheric vent between and a means of 
field testing and draining. 

603.2.4 Double Check Valve Backflow Preven- 
tion Assembly (DC). A double check valve back- 
flow prevention assembly consists of two (2) 
independently acting internally loaded check 
valves, four (4) properly located test cocks, and 
two (2) isolation valves. 

603.2.5 Pressure Vacuum Breaker Backflow 
Prevention Assembly (PVB). A pressure 
vacuum breaker backflow prevention assembly 
consists of a loaded air inlet valve, an internally 
loaded check valve, two (2) properly located test 
cocks, and two (2) isolation valves. This device 
shall be installed indoors only if provisions for 
spillage are provided. 

603.2.6 Pressure Vacuum Breaker Spill- 
Resistant-Type Backflow Prevention 
Assembly (SVB). A pressure-type vacuum 
breaker backflow prevention assembly consists 
of one (1) check valve force-loaded closed and 
an air inlet vent valve force-loaded open to atmo- 
sphere, positioned downstream of the check 
valve, and located between and including two 
(2) tightly closing shutoff valves and test cocks. 

603.2.7 Reduced-Pressure Principle Backflow 
Prevention Assembly (RP). A reduced-pressure 
principle backflow prevention assembly consists 
of two (2) independently acting internally 
loaded check valves, a differential pressure-relief 
valve, four (4) properly located test cocks, and 
two (2) isolation valves. 



603.3 General Requirements. 

603.3.1 Assemblies shall conform to listed stan- 
dards and be acceptable to the Authority Having 
Jurisdiction, with jurisdiction over the selection 
and installation of backflow prevention assem- 
blies. 

603.3.2 Where more than one (1) backflow 
prevention valve is installed on a single premise, 
and the valves are installed in one (1) location, 
each separate valve shall be permanently identi- 
fied by the permittee in a manner satisfactory to 
the Authority Having Jurisdiction. 

603.3.3 The premise owner or responsible 
person shall have the backflow prevention 
assembly tested by a certified backflow assembly 
tester at the time of installation, repair, or reloca- 
tion and not less than on an annual schedule 
thereafter, or more often when required by the 
Authority Having Jurisdiction. The periodic 
testing shall be performed in accordance with the 
procedures referenced in Table 14-1 by a tester 
qualified in accordance with those standards. 

603.3.4 Access and clearance shall be provided 
for the required testing, maintenance, and repair. 
Access and clearance shall require a minimum of 
one (1) foot (305 mm) between the lowest portion 
of the assembly and grade, floor, or platform. 
Installations elevated exceeding five (5) feet 
(1,524 mm) above the floor or grade shall be 
provided with a permanent platform capable of 
supporting a tester or maintenance person. 

603.3.5 Direct connections between potable 
water piping and sewer-connected wastes shall 
not be permitted to exist under any condition 
with or without backflow protection. Where 
potable water is discharged to the drainage 
system, it shall be by means of an approved 
airgap of two (2) pipe diameters of the supply 
inlet, but in no case shall the gap be less than one 
(1) inch (25.4 mm). Connection shall be permitted 
to be made to the inlet side of a trap provided 
that an approved vacuum breaker is installed not 
less than six (6) inches (152 mm), or the distance 
according to the device's listing, above the flood- 
level rim of such trapped fixture, so that at no 
time will any such device be subjected to any 
back-pressure. 

603.3.6 Backflow preventers for hot water 
exceeding 110°F (43.3°C) shall be a type designed 
to operate at temperatures exceeding 110°F 
(43.3°C) without rendering any portion of the 
assembly inoperative. 

603.3.7 Fixtures, appliances, or appurtenances 
with integral backflow preventers or integral 
airgaps manufactured as a unit shall be installed 
in accordance with their listing requirements 
and the manufacturer's instructions. 



111 



603.3 - 603.4 



UNIFORM PLUMBING CODE 



603.3.8 In cold climate areas, backflow assem- 
blies and devices shall be protected from 
freezing with an outdoor enclosure or by a 
method acceptable to the Authority Having 
Jurisdiction. 

603.3.9 Drain lines serving backflow devices or 
assemblies shall be sized in accordance with the 
discharge rates of the manufacturer's flow charts 
of such devices or assemblies. 

603.3.10 Design and Installation of Plumbing 
Fixtures. Plumbing fixtures shall be installed 
such that fixture fittings, complying with the 
backflow prevention requirements of ASME 
A112.18.1 /CSA B125.1, do not have these require- 
ments compromised by the designated fixture 
fitting mounting surface. 

603.4 Specific Requirements. 

603.4.1 Water closet and urinal flushometer 
valves shall be equipped with an atmospheric 
vacuum breaker. The vacuum breaker shall be 
installed on the discharge side of the flushometer 
valve with the critical level not less than six (6) 
inches (152 mm), or the distance according to its 
listing, above the overflow rim of a water closet 
bowl or the highest part of a urinal. 

603.4.2 Water closet and urinal tanks shall be 
equipped with a ballcock. The ballcock shall be 
installed with the critical level not less than one 
(1) inch (25.4 mm) above the full opening of the 
overflow pipe. In cases where the ballcock has 
no hush tube, the bottom of the water supply 
inlet shall be installed one (1) inch (25.4 mm) 
above the full opening of the overflow pipe. 

603.4.3 Water closet flushometer tanks shall be 
protected against backflow by an approved back- 
flow prevention assembly, device, or method. 

603.4.4 Heat Exchangers. 

603.4.4.1 Heat exchangers used for heat 
transfer, heat recovery, or solar heating shall 
protect the potable water system from being 
contaminated by the heat-transfer medium. 
Single-wall heat exchangers used in indi- 
rect-fired water heaters shall meet the 
requirements of Section 506.4.2. Double-wall 
heat exchangers shall separate the potable 
water from the heat-transfer medium by 
providing a space between the two (2) walls 
that are vented to the atmosphere. 

603.4.5 Water supply inlets to tanks, vats, 
sumps, swimming pools, and other receptors 
shall be protected by one of the following means: 

(1) An approved airgap. 

(2) A listed vacuum breaker installed on the 
discharge side of the last valve with the crit- 



ical level not less than six (6) inches (152 
mm) or in accordance with its listing. 

(3) A backflow preventer suitable for the 
contamination or pollution, installed in 
accordance with the requirements for that 
type of device or assembly as set forth in 
this chapter. 

603.4.6 Protection from Lawn Sprinklers and 
Irrigation Systems. 

603.4.6.1 Potable water supplies to systems 
having no pumps or connections for 
pumping equipment, and no chemical injec- 
tion or provisions for chemical injection, 
shall be protected from backflow by one of 
the following devices: 

(1 ) Atmospheric vacuum breaker 

(2) Pressure vacuum breaker 

(3) Spill-resistant pressure vacuum breaker 

(4) Reduced-pressure backflow preventer 

603.4.6.2 Where sprinkler and irrigation 
systems have pumps, connections for 
pumping equipment, or auxiliary air tanks, 
or are otherwise capable of creating back- 
pressure, the potable water supply shall be 
protected by the following type of device if 
the backflow device is located upstream 
from the source of back-pressure: 

(1) Reduced-pressure backflow preventer 

603.4.6.3 Where systems have a backflow 
device installed downstream from a potable 
water supply pump or a potable water 
supply pump connection, the device shall be 
one of the following: 

(1) Atmospheric vacuum breaker 

(2) Pressure vacuum breaker 

(3) Spill-resistant pressure vacuum breaker 

(4) Reduced-pressure backflow preventer 

603.4.6.4 Where systems include a chemical 
injector or any provisions for chemical injec- 
tion, the potable water supply shall be 
protected by the following: 

(1) Reduced-pressure backflow preventer 

603.4.7 Potable water outlets with hose attach- 
ments, other than water heater drains, boiler 
drains, and clothes washer connections, shall be 
protected by a nonremovable hose-bibb-type 
backflow preventer, a nonremovable hose bibb- 
type vacuum breaker, or by an atmospheric 
vacuum breaker installed not less than six (6) 
inches (152 mm) above the highest point of usage 
located on the discharge side of the last valve. In 
climates where freezing temperatures occur, a 



112 



WATER SUPPLY AND DISTRIBUTION 



603.4 



listed self-draining frost-proof hose bibb with an 
integral backflow preventer or vacuum breaker 
shall be used. 

603.4.8 Water-cooled compressors, degreasers, or 
any other water-cooled equipment shall be 
protected by a backflow preventer installed in 
accordance with the requirements of this chapter. 

Note: Water-cooled equipment that produces 
back-pressure shall be equipped with the 
appropriate protection. 

603.4.9 Water inlets to water-supplied aspira- 
tors shall be equipped with a vacuum breaker 
installed in accordance with its listing require- 
ments and this chapter. The discharge shall 
drain through an airgap. When the tailpiece of a 
fixture to receive the discharge of an aspirator is 
used, the airgap shall be located above the flood- 
level rim of the fixture. 

603.4.10 Potable water makeup connections to 
steam or hot water boilers shall be provided 
with a listed backflow protection assembly. 

603.4.11 Nonpotable Water Piping. In cases 
where it is impractical to correct individual cross- 
connections on the domestic waterline, the line 
supplying such outlets shall be considered a 
nonpotable water line. No drinking or domestic 
water outlets shall be connected to the non-potable 
waterline. Whenever possible, portions of the 
nonpotable waterline shall be exposed, and 
exposed portions shall be properly identified in a 
manner satisfactory to the Authority Having Juris- 
diction. Each outlet on the nonpotable waterline 
that is permitted to be used for drinking or 
domestic purposes shall be posted: "Caution: 
Nonpotable water, do not drink." 

603.4.12 Potable water supply to carbonators shall 
be protected by either an airgap or a vented back- 
flow preventer for carbonated beverage dispensers 
installed within the carbonated beverage dispenser. 
The carbonated beverage dispenser shall bear the 
label of an approved testing agency, certifying and 
attesting that such equipment has been tested and 
inspected and meets the requirements of the 
approved applicable standard. Carbonated 
beverage dispensers without an approved internal 
airgap or vented backflow preventer for carbonated 
beverage dispensers and carbonated beverage 
dispensing systems shall have the water supply 
protected with a vented backflow preventer for 
carbonated beverage dispensers. 

603.4.13 Water Treatment Units. Reverse 
osmosis drinking water treatment units shall 
meet the requirements of the applicable stan- 
dards referenced in Table 14-1. Waste or 
discharge from reverse osmosis or other types of 



water treatment units shall enter the drainage 
system through an airgap. 

603.4.14 Backflow preventers shall not be 
located in. any area containing fumes that are 
toxic, poisonous, or corrosive. 

603.4.15 Deck-mounted or equipment-mounted 
vacuum breakers shall be installed in accordance 
with their listing and the manufacturer's instruc- 
tions, with the critical level not less than one (1) 
inch (25.4 mm) above the flood-level rim. 

603.4.16 Protection from Fire Systems. 

603.4.16.1 Except as provided under 
Sections 603.4.16.2 and 603.4.16.3, potable 
water supplies to fire protection systems 
that are normally under pressure, including 
but not limited to standpipes and automatic 
sprinkler systems, except in one- or two- 
family residential sprinkler systems, piped 
in materials approved for potable water 
distribution systems shall be protected from 
back-pressure and back-siphonage by one of 
the following testable devices: 

(1) Double check valve assembly 

(2) Double check detector assembly 

(3) Reduced pressure backflow preventer 

(4) Reduced pressure detector assembly 
Potable water supplies to fire protection 

systems that are not normally under pres- 
sure shall be protected from backflow and 
shall meet the requirements of the appro- 
priate standards referenced in Table 14-1. 

603.4.16.2 Where fire protection systems 
supplied from a potable water system 
include a fire department (siamese) connec- 
tion that is located less than seventeen- 
hundred (1,700) feet (518 m) from a non- 
potable water source that could be used by 
the fire department as a secondary water 
supply, the potable water supply shall be 
protected by one of the following: 

(1) Reduced pressure backflow preventer 

(2) Reduced pressure detector assembly 

Note: Nonpotable water sources include 
fire department vehicles carrying water 
of questionable quality or water that is 
treated with antifreeze, corrosion 
inhibitors, or extinguishing agents. 

603.4.16.3 Where antifreeze, corrosion 
inhibitors, or other chemicals are added to a 
fire protection system supplied from a 
potable water supply, the potable water 
system shall be protected by one of the 
following: 



113 



603.4-604.8 



UNIFORM PLUMBING CODE 



(1) Reduced pressure backflow preventer 

(2) Reduced pressure detector assembly 

603.4.16.4 Whenever a backflow device is 
installed in the potable water supply to a 
fire protection system, the hydraulic design 
of the system shall account for the pressure 
drop through the backflow device. If such 
devices are retrofitted for an existing fire 
protection system, the hydraulics of the 
sprinkler system design shall be checked to 
verify that there will be sufficient water 
pressure available for satisfactory operation 
of the fire sprinklers. 

603.4.16.5 Residential Sprinkler Systems. 

When residential sprinkler systems are 
installed using the potable water system, 
they shall be installed in accordance with 
the standards listed in Table 14-1. 

603.4.17 Special Equipment, Water Supply 
Protection. Vacuum breakers for washer-hose 
bedpans shall be located not less than five (5) 
feet (1,524 mm) above the floor. Hose connec- 
tions in health care or laboratory areas shall be 
not less than six (6) feet (1,829 mm) above the 
floor. 

603.4.18 Portable cleaning equipment, dental 
vacuum pumps, and chemical dispensers shall 
be protected from backflow by an airgap, an 
atmospheric vacuum breaker, a spill-resistant 
vacuum breaker, or a reduced pressure principle 
backflow preventer. 

603.4.19 Combination stop-and-waste valves 
or cocks shall not be installed underground. 

603.4.20 Pure Water Process Systems. The 

water supply to a pure water process system, 
such as dialysis water systems, semiconductor 
washing systems, and similar process piping 
systems, shall be protected from back-pressure 
and back-siphonage by a reduced-pressure prin- 
ciple backflow preventer. 

603.4.20.1 Dialysis Water Systems. The 

individual connections of the dialysis 
related equipment to the dialysis pure water 
system shall not require additional backflow 
protection. 

603.4.21 Plumbing Fixture Fittings. Plumbing 
fixture fittings with integral backflow protection 
shall comply with ASME A112.18.1 /CSA B 125.1. 

603.4.22 Potable water supply to swimming 
pools, spas and hot tubs shall be protected by an 
airgap or a reduced pressure principle backflow 
preventer in accordance with the following: 

(1) The unit is equipped with a submerged fill 
line; or 



(2) The potable water supply is directly I 
connected to the unit circulation system. I 

604.0 Materials. 

604.1 Pipe, tube, and fittings carrying water used in 
potable water systems intended to supply drinking 
water shall meet the requirements of NSF 61 as 
found in Table 14-1. Materials used in the water 
supply system, except valves and similar devices, 
shall be of a like material, except where otherwise 
approved by the Authority Having Jurisdiction. 

Materials for building water piping and building 
supply piping shall be in accordance with the appli- I 
cable standards referenced in Table 6-4. 

604.2 Copper tube for water piping shall have a 
weight of not less than Type L. 

Exception: Type M copper tubing shall be 
permitted to be used for water piping when 
piping is above ground in, or on, a building or 
underground outside of structures. 

604.3 Hard-drawn copper tubing for water supply 
and distribution in addition to the required incised 
marking, shall be marked in accordance with ASTM 
B 88 Seamless Copper Water Tube as referenced in 
Table 14-1. The colors shall be: Type K, green; Type 
L, blue; Type M, red. 

604.4 Listed flexible copper water connectors shall 
be installed in readily accessible locations, unless 
otherwise listed. 

604.5 Cast-iron fittings up to and including two (2) 
inches (51 mm) in size, when used in connection 
with potable water piping, shall be galvanized. 

604.6 Malleable iron water fittings shall be galva- 
nized. 

604.7 Piping and tubing that has previously been 
used for any purpose other than for potable water 
systems shall not be used. 

604.8 Approved plastic materials shall be permitted 
to be used in water service piping, provided that 
where metal water service piping is used for elec- 
trical grounding purposes, replacement piping there- 
fore shall be of like materials. 

Exception: Where a grounding system acceptable 
to the Authority Having Jurisdiction is installed, 
inspected, and approved, metallic pipe shall be 
permitted to be replaced with nonmetallic pipe. 
Plastic materials for water service piping outside 
underground shall have a blue insulated copper 
tracer wire or other approved conductor 
installed adjacent to the piping. Access shall be 
provided to the tracer wire or the tracer wire 
shall terminate above ground at each end of the 
nonmetallic piping. The tracer wire size shall be 
not less than 18 AWG and the insulation type 
shall be suitable for direct burial. 



114 



WATER SUPPLY AND DISTRIBUTION 



Table 6-4 -604.13 



TABLE 6-4 
Materials for Building Supply and Water Distribution Piping and Fittings 



Material 


Building 
Supply Pipe 
and Fittings 


Water 

Distribution 

Pipe and 

Fittings 


Referenced 
Standard(s) Pipe 


Referenced 
Standard(s) Fittings 


Asbestos-Cement 


X 1 




ASTM C296, AWWA C400 




Brass 


X 


X 


ASTM B43, ASTM BBS 




Copper 


X 


X 


ASTM B42, ASTM B75, 
ASTM B88, ASTM B251, 
ASTM B302, ASTM B447 


ASME B16.15, ASME 
B16.18, ASME B16.22, 

ASME B16.26 


CPVC 


X 


X 


ASTM D2846, ASTM F441, 
ASTM F442 


ASTM D2846, ASTM F437, 
ASTM F438, ASTM F439, 
ASTM F1970 


Ductile-Iron 


X 


X 


AWWA C151 


ASME B16.4, AWWA CI 10, 
AWWA C153 


Galvanized Steel 


X 


X 


ASTM A53 




Malleable Iron 


X 


X 




ASME B16.3 


PE 


X 1 




ASTM D2239, ASTM 
D2737, ASTM D3035, 
AWWA C901, CSA B137.1 


ASTM D2609, ASTM D2683, 
ASTM D3261, ASTM F1055, 
CSAB137.1 


PE-AL-PE 


X 


X 


ASTM F1282, CSA B137.9 


ASTM F1282, ASTM F1974, 
CSA Bl 37.9 


PEX 


X 


X 


ASTM F876 , ASTM F877, 
CSA B137.5 


ASTM F877, ASTM F1807, 
ASTM F1960, ASTM F1961, 
ASTM F2080, ASTM F2159, 
CSA Bl 37.5 


PEX-AL-PEX 


X 


X 


ASTM F1281, CSA B137.10, 
ASTM F2262 


ASTM F1281, ASTM F1974, 
ASTM F2434, CSA B137.10 


PVC 


X 1 




ASTM Dl 785, ASTM 
D2241, AWWA C900 


ASTM D2464, ASTM D2466, 
ASTM D2467, ASTM F1970 


Stainless Steel 


X 


X 


ASTM A269, ASTM A312 





1 For Building Supply or cold-water applications. 

604.9 Solder shall conform to the requirements of 
Section 316.1.3. 

604.10 Water pipe and fittings with a lead content 
which exceeds eight (8) percent shall be prohibited in 
piping systems used to convey potable water. 

604.1 1 PEX. Cross-linked polyethylene (PEX) tubing 
conforming to ASTM F877 shall be marked with the 
appropriate standard designation(s) for the fittings 
specified for use with the tubing. Such marking shall 
not be required for PEX tubing conforming to only 
ASTM F876. PEX tubing shall be installed in compli- 
ance with the provisions of this section. 

604.11.1 PEX Fittings. Fittings used with PEX 
tubing shall be manufactured to and marked in 
accordance with the standards for the fittings 
referenced in Table 14-1. 



604.11.2 Water Heater Connections. PEX 

tubing shall not be installed within the first eigh- 
teen (18) inches (457 mm) of piping connected to 
a water heater. 

604.12 Flexible Corrugated Connectors. Flexible 
corrugated connectors of copper or stainless steel 
shall be limited to the following connector lengths: 

Water Heater Connectors - twenty-four (24) 
inches (610 mm). 

Fixture Connectors - thirty (30) inches (762 mm). 

Washing Machine Connectors - seventy-two 
(72) inches (1,829 mm). 

Dishwasher and Icemaker Connectors - one- 
hundred and twenty (120) inches (3,048 mm). 

604.13 PEX-AL-PEX and PE-AL-PE. Crosslinked 
polyethylene-aluminum-crosslinked polyethylene 



115 



604.13-606.2 



UNIFORM PLUMBING CODE 



(PEX-AL-PEX) and polyethylene-aluminum- 
polyethylene (PE-AL-PE) composite pipe shall be 
marked with the applicable standard referenced in 
Table 14-1 for which the piping has been listed or 
approved. PEX-AL-PEX and PE-AL-PE piping shall 
be installed in compliance with the provisions of this 
section. 

604.13.1 PEX-AL-PEX and PE-AL-PE. Fittings 
used with PEX-AL-PEX and PE-AL-PE piping 
shall be manufactured to and marked in accor- 
dance with the standard for the fittings refer- 
enced in Table 14-1. 

604.13.2 Water Heater Connections. PEX-AL- 
PEX or PE-AL-PE tubing shall not be installed 
within the first eighteen (18) inches (457 mm) of 
piping connected to a water heater. 

604.14 Water Heater Connectors. Flexible metallic 
water heater connectors or reinforced flexible water 
heater connectors connecting water heating to the 
piping system shall be in compliance with the appli- 
cable standards referenced in Table 14-1. 



605.0 Valves. 

605.1 Valves up to and including two (2) inches (51 
mm) in size shall be brass or other approved mate- 
rial Sizes exceeding two (2) inches (51 mm) shall be 
permitted to have cast-iron or brass bodies. Each 
gate or ball valve shall be a fullway type with 
working parts of non-corrosive material. Valves 
carrying water used in potable water systems 
intended to supply drinking water shall meet the 
requirements of NSF 61 as referenced in Table 14-1. 

605.2 A fullway valve controlling outlets shall be 
installed on the discharge side of each water meter 
and on each unmetered water supply. Water piping 
supplying more than one (1) building on any one (1) 
premises shall be equipped with a separate fullway 
valve to each building, so arranged that the water 
supply can be turned on or off to any individual or 
separate building provided; however, that supply 
piping to a single-family residence and building 
accessory thereto shall be permitted to be controlled 
on one (1) valve. Such shutoff valves shall be acces- 
sible at all times. A fullway valve shall be installed 
on the discharge piping from water supply tanks at 
or near the tank. A fullway valve shall be installed 
on the cold water supply pipe to each water heater at 
or near the water heater. 

605.3 In multidwelling units, one (1) or more shutoff 
valves shall be provided in each dwelling unit so 
that the water supply to any plumbing fixture or 
group of fixtures in that dwelling unit can be shut off 
without stopping water supply to fixtures in other 
dwelling units. These valves shall be accessible in the 
dwelling unit that they control. 



605.4 Valves used to control two (2) or more open- 
ings shall be fullway gate valves, ball valves, or other 
approved valves designed and approved for the 
service intended. 

605.5 A control valve shall be installed immediately 
ahead of each water-supplied appliance and immedi- 
ately ahead of each slip joint or appliance supply. 

Parallel water distribution systems shall provide 
a control valve either immediately ahead of each 
fixture being supplied or installed at the manifold 
and shall be identified with the fixture being 
supplied. 

605.6 Required shutoff or control valves shall be 
accessible. 

605.7 A single control valve shall be installed on a 
water supply line ahead of any automatic metering 
valve that supplies a battery of fixtures. 

606.0 Joints and Connections. 

606.1 Types of Joints. 

606.1.1 Flared Joints. Flared joints for soft 
copper water tubing shall be made with fittings 
meeting approved standards. The tubing shall 
be reamed to the full bore, resized to round, and 
expanded with a proper flaring tool. 

606.1.2 Mechanical Joints. Mechanical joints 
for cast-iron water pipe shall conform to nation- 
ally recognized standards. 

606.1.3 Mechanically Formed Tee Fittings. 

Mechanically extracted collars shall be formed in 
a continuous operation consisting of drilling a 
pilot hole and drawing out the tube surface to 
form a collar having a height not less than three 
(3) times the thickness of the branch tube wall. 

The branch tube shall be notched to conform 
with the inner curve of the run tube and shall 
have two (2) dimple /depth stops to ensure that 
penetration of the branch tube into the collar is 
of sufficient depth for brazing and that the 
branch tube does not obstruct the flow in the 
main line tube. Dimple /depth stops shall be in 
line with the run of the tube. The second dimple 
shall be one-quarter (1/4) inch (6.4 mm) above 
the first and shall serve as a visual point of 
inspection. 

Joints shall be brazed in accordance with 
Section 316.1.7. Soldered joints shall not be 
allowed. 

606.2 Use of Joints. 

606.2.1 Copper Water Tube. Joints in copper 
tubing shall be made by the appropriate use of 
approved fittings properly soldered or brazed 
together as provided in Section 316.1.3 or 316.1.7 



116 



WATER SUPPLY AND DISTRIBUTION 



606.2-608.5 



or by means of approved flared or compression 
fittings in Sections 606.1.1 or 316.1.5. Solder and 
soldering flux shall conform to the requirements 
of Section 316.1.3. Mechanically formed tee 
fittings shall be made by brazing only and shall 
conform to the requirements of Sections 316.1.7 
and 606.1.3. 

606.2.2 Plastic Fittings. Female PVC screwed 
fittings for water piping shall be used with 
plastic male fittings and plastic male threads 
only. 

606.2.3 Slip Joints. In water piping, slip joints 
shall be permitted to be used only on the 
exposed fixture supply. 

607.0 Gravity Supply Tanks. 

Gravity tanks for potable water shall be tightly 
covered, and have not less than a sixteen (16) square 
inch (10,323 mm 2 ) overflow screened with copper 
screen having not less than fourteen (14) nor 
exceeding eighteen (18) openings per linear inch 
(25.4 mm). 

608.0 Water Pressure, Pressure Regulators, Pres- 
sure Relief Valves, and Vacuum Relief Valves. 

608.1 inadequate Water Pressure. Whenever the 
water pressure in the main or other source of supply 
will not provide a residual water pressure of not less 
than fifteen (15) pounds per square inch (103 kPa), 
after allowing for friction and other pressure losses, a 
tank and a pump or other means that will provide 
said fifteen (15) pound (103 kPa) pressure shall be 
installed. Whenever fixtures and /or fixture fittings 
are installed that require residual pressure exceeding 
fifteen (15) pounds per square inch (103 kPa), that 
minimum residual pressure shall be provided. 

608.2 Excessive Water Pressure. Where static 
water pressure in the water supply piping is 
exceeding eighty (80) pounds per square inch (552 
kPa), an approved-type pressure regulator preceded 
by an adequate strainer shall be installed and the 
static pressure reduced to eighty (80) pounds per 
square inch (552 kPa) or less. Pressure regulator(s) 
equal to or exceeding one and one-half (1-1 /2) inches 
(38 mm) shall not require a strainer. Such 
regulator(s) shall control the pressure to all water 
outlets in the building unless otherwise approved by 
the Authority Having Jurisdiction. Each such regu- 
lator and strainer shall be accessibly located above 
ground or in a vault equipped with a properly sized 
and sloped bore-sighted drain to daylight, shall be 
protected from freezing, and shall have the strainer 
readily accessible for cleaning without removing the 
regulator or strainer body or disconnecting the 
supply piping. Pipe size determinations shall be 
based on 80 percent of the reduced pressure when 



using Table 6-6. An approved expansion tank shall 
be installed in the cold water distribution piping 
downstream of each such regulator to prevent exces- 
sive pressure from developing due to thermal expan- 
sion and to maintain the pressure setting of the regu- 
lator. The expansion tank shall be properly sized and 
installed in accordance with the manufacturer's 
instructions and listing. Systems designed by regis- 
tered engineers shall be permitted to use approved 
pressure relief valves in lieu of expansion tanks 
provided such relief valves have a maximum pres- 
sure relief setting of one-hundred (100) pounds per 
square inch (689 kPa) or less. 

608.3 Any water system provided with a check 
valve, backflow preventer, or any other normally 
closed device that prevents dissipation of building 
pressure back into the water main shall be provided 
with an approved, listed, and adequately sized 
expansion tank or other approved device having a 
similar function to control thermal expansion. Such 
expansion tank or other approved device shall be 
installed on the building side of the check valve, 
backflow preventer, or other device and shall be 
sized and installed in accordance with the manufac- 
turer's recommendation. 

Any water system containing storage water 
heating equipment shall be provided with an 
approved, listed, adequately sized combination pres- 
sure and temperature relief valve, except for listed 
nonstorage instantaneous heaters having an inside 
diameter of not more than three (3) inches (80 mm). 
Each such approved combination temperature and 
pressure relief valve shall be installed on the water- 
heating device in an approved location based on its 
listing requirements and the manufacturer's instruc- 
tions. Each such combination temperature and pres- 
sure relief valve shall be provided with a drain as 
required in Section 608.5. 

608.4 Each pressure relief valve shall be an 
approved automatic type with drain, and each such 
relief valve shall be set at a pressure of not more than 
one-hundred and fifty (150) pounds per square inch 
(1,034 kPa). No shutoff valve shall be installed 
between the relief valve and the system or in the 
drain line. 

608.5 Relief valves located inside a building shall be 
provided with a drain, not smaller than the relief 
valve outlet, of galvanized steel, hard-drawn copper 
piping and fittings, CPVC or listed relief valve drain 
tube with fittings that will not reduce the internal 
bore of the pipe or tubing (straight lengths as 
opposed to coils) and shall extend from the valve to 
the outside of the building, with the end of the pipe 
not more than two (2) feet (610 mm) nor less than six 
(6) inches (152 mm) above ground or the flood level 
of the area receiving the discharge and pointing 



117 



608.5-609.7 



UNIFORM PLUMBING CODE 



downward. Such drains shall be permitted to termi- 
nate at other approved locations. Relief valve drains 
shall not terminate in a building's crawl space. No 
part of such drain pipe shall be trapped or subject to 
freezing. The terminal end of the drain pipe shall not 
be threaded. 

608.6 Any water-heating device connected to a sepa- 
rate storage tank and having valves between said 
heater and tank shall be provided with an approved 
water pressure relief valve. 

608.7 Vacuum Relief Valves. Where a hot-water 
storage tank or an indirect water heater is located at 
an elevation above the fixture outlets in the hot- 
water system, a vacuum relief valve shall be installed 
on the storage tank or heater. 

609.0 Installation, Testing, Unions, and Location. 

609.1 Installation. Water piping shall be adequately 
supported in accordance with Section 314.0. Burred 
ends shall be reamed to the full bore of the pipe or 
tube. Changes in direction shall be made by the 
appropriate use of fittings, except that changes in 
direction in copper tubing may be made with bends, 
provided that such bends are made with bending 
equipment that does not deform or create a loss in 
the cross-sectional area of the tubing. Changes in 
direction are allowed with flexible pipe and tubing 
without fittings in accordance with the manufactur- 
er's installation instructions. Provisions shall be 
made for expansion in hot-water piping. Piping, 
equipment, appurtenances, and devices shall be 
installed in a workmanlike manner in conformity 
with the provisions and intent of the code. Water 
service yard piping shall be not less than twelve (12) 
inches (305 mm) below the average local frost depth. 
The cover shall be not less than twelve (12) inches 
(305 mm) below finish grade. 

609.2 Water pipes shall not be run or laid in the 
same trench as building sewer or drainage piping 
constructed of clay or materials that are not 
approved for use within a building unless both of 
the following conditions are met: 

609.2.1 The bottom of the water pipe, at all 
points, shall be not less than twelve (12) inches 
(305 mm) above the top of the sewer or drain 
line. 

609.2.2 The water pipe shall be placed on a solid 
shelf excavated at one (1) side of the common 
trench with a clear horizontal distance of not less 
than twelve (12) inches (305 mm) from the sewer 
or drain line. 

Water pipes crossing sewer or drainage 
piping constructed of clay or materials that are 
not approved for use within a building shall be 



laid not less than twelve (12) inches (305 mm) 
above the sewer or drain pipe. 

609.3 Water piping installed within a building and 
in or under a concrete floor slab resting on the 
ground shall be installed in accordance with the 
following requirements: 

609.3.1 Ferrous piping shall have a protective 
coating of an approved type, machine applied 
and conforming to recognized standards. Field 
wrapping shall provide equivalent protection 
and shall be restricted to those short sections 
and fittings necessarily stripped for threading. 
Zinc coating (galvanizing) shall not be deemed 
adequate protection for piping or fittings. 
Approved nonferrous piping shall not be 
required to be wrapped. 

609.3.2 Copper tubing shall be installed 
without joints where possible. Where joints are 
permitted, they shall be brazed, and fittings 
shall be wrought copper. 

Note: For the purpose of this section, 
" within the building" shall mean within the 
fixed limits of the building foundation. 

609.4 Testing. Upon completion of a section or of 
the entire hot and cold water supply system, it shall 
be tested and proved tight under a water pressure 
not less than the working pressure under which it is 
to be used. The water used for tests shall be 
obtained from a potable source of supply. Except for 
plastic piping, a fifty (50) lb. /in. 2 (345 kPa) air pres- 
sure shall be permitted to be substituted for the 
water test. In either method of test, the piping shall 
withstand the test without leaking for a period of 
not less than fifteen (15) minutes. 

609.5 Unions. Unions shall be installed in the water 
supply piping not more than twelve (12) inches (305 
mm) of regulating equipment, water heating, condi- 
tioning tanks, and similar equipment that requires 
service by removal or replacement in a manner that 
will facilitate its ready removal. 

609.6 Location. Except as provided in Section 609.7, 
no building supply shall be located in any lot other 
than the lot that is the site of the building or struc- 
ture served by such building supply. 

609.7 Nothing contained in this code shall be 
construed to prohibit the use of all or part of an 
abutting lot to: 

609.7.1 Provide access to connect a building 
supply to an available public water service 
when proper cause and legal easement not in 
violation of other requirements have been first 
established to the satisfaction of the Authority 
Having Jurisdiction. 



118 



WATER SUPPLY AND DISTRIBUTION 



609.7-610.3 



609.7.2 Provide additional space for a building 
supply when proper cause, transfer of owner- 
ship, or change of boundary not in violation of 
other requirements have been first established to 
the satisfaction of the Authority Having Jurisdic- 
tion. The instrument recording such action shall 
constitute an agreement with the Authority 
Having Jurisdiction, which shall clearly state 
and show that the areas so joined or used shall 
be maintained as a unit during the time they are 
so used. Such an agreement shall be recorded in 
the office of the County Recorder as a part of the 
conditions of ownership of said properties, and 
shall be binding on heirs, successors, and assigns 
to such properties. A copy of the instrument 
recording such proceedings shall be filed with 
the Authority Having Jurisdiction. 

609.8 Low-Pressure Cutoff Required on Booster 
Pumps for Water Distribution Systems. When a 
booster pump (excluding a fire pump) is connected 
to a water service or underground water pipe, a low- 
pressure cutoff switch on the inlet side of the pump 
shall be installed not more than five (5) feet (1,524 
mm) of the inlet. The cutoff switch shall be set for not 
less than ten (10) psi (69 kPa). A pressure gauge shall 
be installed between the shutoff valve and the pump. 

609.9 Disinfection of Potable Water System. New 

or repaired potable water systems shall be disin- 
fected prior to use whenever required by the 
Authority Having Jurisdiction. The method to be 
followed shall be that prescribed by the Health 
Authority or, in case no method is prescribed by it, 
the following: 

609.9.1 The pipe system shall be flushed with 
clean, potable water until only potable water 
appears at the points of outlet. 

609.9.2 The system or parts thereof shall be 
filled with a water-chlorine solution containing 
not less than fifty (50) parts per million of chlo- 
rine, and the system or part thereof shall be 
valved-off and allowed to stand for twenty-four 
(24) hours; or, the system or part thereof shall be 
filled with a water-chlorine solution containing 
not less than two-hundred (200) parts per 
million of chlorine and allowed to stand for 
three (3) hours. 

609.9.3 Following the allowed standing time, 
the system shall be flushed with clean, potable 
water until the chlorine residual in the water 
coming from the system does not exceed the 
chlorine residual in the flushing water. 

609.9.4 The procedure shall be repeated if it is 
shown by bacteriological examination made by 
an approved agency that contamination persists 
in the system. 



609.10 Water Hammer. Building water supply 
systems where quick-acting valves are installed shall 
be provided with water hammer arrester(s) to absorb | 
high pressures resulting from the quick closing of 
these valves. Water hammer arrestors shall be | 
approved mechanical devices in accordance with the 
applicable standard(s) referenced in Table 14-1 and | 
shall be installed as close as possible to quick-acting 
valves. 

609.10.1 Mechanical Devices. When listed 
mechanical devices are used, the manufacturer's 
specifications as to location and method of 
installation shall be followed. 

610.0 Size of Potable Water Piping. 

610.1 The size of each water meter and each potable 
water supply pipe from the meter or other source of 
supply to the fixture supply branches, risers, 
fixtures, connections, outlets, or other uses shall be 
based on the total demand and shall be determined 
according to the methods and procedures outlined 
in this section. Water piping systems shall be 
designed to ensure that the maximum velocities 
allowed by the code and the applicable standard are 
not exceeded. 

610.2 Whenever a water filter, water softener, back- 
flow prevention device or similar device is installed 
in any water supply line, the pressure loss through 
such devices shall be included in the pressure loss 
calculations of the system, and the water supply pipe 
and meter shall be adequately sized to provide for 
any such pressure loss. 

No water filter, water softener, backflow preven- 
tion device, or similar device regulated by this code 
shall be installed in any potable water supply piping 
when the installation of such device produces an 
excessive pressure drop in any such water supply 
piping. In the absence of specific pressure drop infor- 
mation, the diameter of the inlet or outlet of any such 
device or its connecting piping shall be not less than 
the diameter of such water distribution piping to the 
fixtures served by the device. 

Such devices shall be of a type approved by the 
Authority Having Jurisdiction and shall be tested for 
flow rating and pressure loss by an approved labora- 
tory or recognized testing agency to standards 
consistent with the intent of this chapter. 

610.3 The quantity of water required to be supplied 
to every plumbing fixture shall be represented by 
fixture units, as shown in Table 6-5. Equivalent 
fixture values shown in Table .6-5 include both hot 
and cold water demand. 



119 



610.4-610.10 



UNIFORM PLUMBING CODE 



610.4 Systems within the range of Table 6-6 shall be 
permitted to be sized from that table or by the 
method set forth in Section 610.5. 

Listed parallel water distribution systems shall 
be installed in accordance with their listing, but at no 
time shall any portion of the system exceed the 
maximum velocities allowed by the code. 

610.5 Except as provided in Section 610.4, the size of 
each water piping system shall be determined in 
accordance with the procedure set forth in Appendix 
A. For alternate methods of sizing water supply 
systems, see Appendix L. 

610.6 Except where the type of pipe used and the 
water characteristics are such that no decrease in 
capacity due to length of service (age of system) is 
expected, friction-loss data shall be obtained from 
the "Fairly Rough" or "Rough" charts in Appendix 
A of this code. Friction or pressure losses in water 
meter, valve, and fittings shall be obtained from the 
same sources. Pressure losses through water-treating 
equipment, backflow prevention devices, or other 
flow-restricting devices shall be computed as 
required by Section 610.2. 

610.7 On any proposed water piping installation 
sized using Table 6-6, the following conditions shall 
be determined: 

(1) Total number of fixture units as determined 
from Table 6-5, Equivalent Fixture Units, for the 
fixtures to be installed. 

(2) Developed length of supply pipe from meter to 
most remote outlet. 

(3) Difference in elevation between the meter or 
other source of supply and the highest fixture or 
outlet. 

(4) Pressure in the street main or other source of 
supply at the locality where the installation is to 
be made. 

(5) In localities where there is a fluctuation of pres- 
sure in the main throughout the day, the water 
piping system shall be designed on the basis of 
the minimum pressure available. 

610.8 Size of Meter and Building Supply Pipe 
Using Table 6-6. The size of the meter and the 
building supply pipe shall be determined as follows: 

(1) Determine the available pressure at the water 
meter or other source of supply. 

(2) Subtract one-half (1/2) pound per square inch 
pressure (3.4 kPa) for each foot (305 mm) of 
difference in elevation between such source of 
supply and the highest water supply outlet in the 
building or on the premises. 



(3) Use the "pressure range" group within which 
this pressure will fall using Table 6-6. 

(4) Select the "length" column that is equal to or 
longer than the required length. 

(5) Follow down the column to a fixture unit value 
equal to or exceeding the total number of fixture 
units required by the installation. 

(6) Having located the proper fixture unit value for 
the required length, sizes of meter and building 
supply pipe as found, in the two (2) left-hand 
columns shall be applied. 

No building supply pipe shall be less than three- 
quarters (3/4) of an inch (20 mm) in diameter. 

610.9 Size of Branches. When Table 6-6 is used, 
the minimum size of each branch shall be deter- 
mined by the number of fixture units to be served 
by that branch, the total developed length of the 
system, and the meter and street service size as per 
Section 610.8. No branch piping is required to be 
larger in size than that required by Table 6-6 for the 
building supply pipe. 

610.10 Sizing for Flushometer Valves. When using 
Table 6-6 to size water supply systems serving 
flushometer valves, the number of flushometer 
fixture units assigned to every section of pipe, 
whether branch or main, shall be determined by the 
number and category of flushometer valves served 
by that section of pipe, in accordance with Table 6-7. 
Piping supplying a flushometer valve shall be not 
less in size than the valve inlet. 

When using Table 6-7 to size water piping, care 
must be exercised to assign flushometer fixture units 
based on the number and category of fixtures served. 



LAV LAV UR UR WC WC 
_l I I L_l I 



LAV LAV UR UR WC WC 
I I l_l I L__ 



M 



LAV UR WC LAV UR WC 
_J I 1 I I I 



R Q P O N 



Sizing Method 

Example Using Table 6-7 

Public Use Fixtures 



120 



WATER SUPPLY AND DISTRIBUTION 



610.10-611.4 



In the example below, fixture units assigned to each 
section of pipe are computed as follows: Note: Each 
capital letter refers to the section of pipe above it 
unless otherwise shown. 

A: 1WC = 40F.U. 

B: 2 WC = 70 F.U. 

C: 2 WC (70) + 1 UR (20) = 90 F.U. 

D: 2 WC (70) + 2 UR (35) - 105 F.U. 

E: 2 WC (70) + 2 UR (35) + 1 LAV (1) - 106 F.U. 

F: 2 WC (70) + 2 UR (35) + 2 LAV (2) - 107 F.U. ' 

G: 1 LAV = 1 F.U. 

H: 2 LAV = 2 F.U. 

I: 2 LAV (2) + 1 UR (20) = 22 F.U. 

J: 2 LAV (2)+ 2 UR (35) = 37 F.U. 

K: 2 LAV (2) + 2 UR (35) + 1 WC (40) = 77 F.U. 

L: 2 LAV (2) + 2 UR (35) + 2 WC (70) = 107 F.U. 

M: 4 WC (105) + 4 UR (53) + 4 LAV (4) - 162 F.U. 

N: 1WC-40F.U. 

O: 1 WC (40) + 1 UR (20) - 60 F.U. 

P: 1 WC (40) + 1 UR (20) + 1 LAV (1) = 61 F.U. 

Q: 2 WC (70) + 1 UR (20) + 1 LAV (1) = 91 F.U. 

R: 2 WC (70) + 2 UR (35) + 1 LAV (1) = 106 F.U. 

S: 2 WC (70) + 2 UR (35) + 2 LAV (2) = 107 F.U. 

T: 6 WC (125) + 6 UR (63) + 6 LAV (6) = 194 F.U. 

610.11 Sizing Systems for Flushometer Tanks. 

The size of branches and mains serving flushometer 
tanks shall be consistent with the sizing procedures 
for flush tank water closets. 

610.12 Sizing for Velocity. Water piping systems 
shall not exceed the maximum velocities listed in this 
section or Appendix A. 

610.12.1 Copper Tube Systems. Maximum 
velocities in copper and copper alloy tube and 
fitting systems shall not exceed eight (8) feet per 
second (fps) (2.4 mps) in cold water and five (5) 
fps in hot water (1.5 mps). 

610.12.2 Tubing Systems Using Copper Alloy 
Fittings. Maximum velocities through copper 
alloy fittings in tubing other than copper shall 
not exceed eight (8) feet per second (fps) (2.4 
mps) in cold water and five (5) fps in hot water 
(1.5 mps). 

610.13 Exceptions. The provisions of this section 
relative to size of water piping shall not apply to the 
following: 

(1) Water supply piping systems designed in accor- 
dance with recognized engineering procedures 
acceptable to the Authority Having Jurisdiction. 



(2) Alteration of or minor additions to existing 
installations, provided the Authority Having 
Jurisdiction finds that there will be an adequate 
supply of water to operate all fixtures. 

(3) Replacement of existing fixtures or appliances. 

(4) Piping that is part of fixture equipment. 

(5) Unusual conditions where, in the judgment of 
the Authority Having Jurisdiction, an adequate 
supply of water is provided to operate fixtures 
and equipment. 

(6) Nonpotable waterlines as defined in Sections 
601.2.2 and 601.2.4. 

(7) The size and material of irrigation water piping 
installed outside of any building or structure 
and separated from the potable water supply by 
means of an approved airgap or backflow 
prevention device is not regulated by this code. 
The potable water piping system supplying each 
such irrigation system shall be adequately sized 
as required elsewhere in this chapter to deliver 
the full connected demand of both the domestic 
use and the irrigation systems. 

611.0 Drinking Water Treatment Units. 

611.1 Compliance with Standard. Drinking water 
treatment units shall meet the requirements of the 
appropriate standard referenced in Table 14-1. 

611.2 Airgap Discharge. Discharge from drinking 
water treatment units shall enter the drainage system 
through an airgap or an airgap device that meets the 
requirements of the appropriate standards refer- 
enced in Table 14-1. 

611.3 Connection Tubing. The tubing to and from 
drinking water treatment units shall be of a size and 
material as recommended by the manufacturer. The 
tubing shall comply with the requirements of the 
appropriate standards referenced in Table 14-1. 

611.4 Sizing of Residential Softeners. Residential- 
use water softeners shall be sized per Table 6-8. 



121 



Table 6-5 


Inch 


mm 


1/2 


15 


3/4 


20 


1 


25 



UNIFORM PLUMBING CODE 



TABLE 6-5 
Water Supply Fixture Units (WSFU) and Minimum Fixture Branch Pipe Sizes 3 



Minimum 
Fixture Branch 

Appliances, Appurtenances or Fixtures 2 Pipe Size 1 4 

Bathtub or Combination Bath/ Shower (fill) 1/2" 

3/4" Bathtub Fill Valve 3/4" 

Bidet 1/2" 

Clothes washer 1/2" 

Dental Unit, cuspidor 1 /2" 

Dishwasher, domestic 1/2" 

Drinking Fountain or Water Cooler 1/2" 

Hose Bibb 1 1/2" 

Hose Bibb, each additional 8 1 /2" 

Lavatory 1/2" 

Lawn Sprinkler, each head 5 

Mobile Home, each (minimum) 

Sinks 

Bar 1/2" 

Clinic Faucet 1/2" 

Clinic Flushometer Valve 

with or without faucet 1" 

Kitchen, domestic 1 /2" 

Laundry 1/2" 

Service or Mop Basin '. 1 /T 

Washup, each set of faucets , 1/2" 

Shower, per head 1 /2" 

Urinal, 1.0 GPF Flushometer Valve 3/4" 

Urinal, greater than 1.0 GPF Flushometer Valve 3/4" 

Urinal, flush tank 1 /2" 

Wash Fountain, circular spray..... 3/4" 

Water Closet, 1.6 GPF Gravity Tank 1 IT 

Water Closet, 1.6 GPF Flushometer Tank 1 IT 

Water Closet, 1.6 GPF Flushometer Valve 1" 

Water Closet, greater than 1.6 GPF Gravity Tank 1 IT 

Water Closet, greater than 1.6 GPF Flushometer Valve 1" 

Notes: 



Private 

4.0 

10.0 

1.0 

4.0 

1.5 

0.5 
2.5 
1.0 
1.0 
1.0 
12.0 

1.0 



Public Assembly 6 

4.0 
10.0 



1.5 
1.5 

1.5 

2.0 
See Footnote 7 
See Footnote 7 

2.0 . 



4.0 
1.0 
1.5 

0.5 
2.5 
1.0 
1.0 
1.0 



2.0 
3.0 

8.0 
1.5 

1.5 

3.0 
2.0 
2.0 



2.0 
4.0 

2.5 
2.5 



2.5 
2.5 

See Footnote 7 
3.0 5.5 

See Footnote 7 



0.75 



1.0 



3.0 

3.5 
3.5 

7.0 



Size of the cold branch pipe, or both the hot and cold branch pipes. 

Appliances, Appurtenances or Fixtures not included in this Table may be sized by reference to fixtures having a similar flow rate 

and frequency of use. 

The listed fixture unit values represent their load on their cold water service. The separate cold water and hot water fixture unit 
value for fixtures having both hot and cold water connections may each be taken as three-quarter (3/4) of the listed total value of 
the fixture. 
The listed minimum supply branch pipe sizes for individual fixtures are the nominal (l.D.) pipe size. 

For fixtures or supply connections likely to impose continuous flow demands, determine the required flow in gallons per minute 
(GPM), and add it separately to the demand (in GPM) for the distribution system or portions thereof. 

Assembly [Public Use (See Table 4-1)]. 

When sizing flushometer systems, see Section 610.10. 

Reduced fixture unit loading for additional hose bibbs is to be used only when sizing total building demand and for pipe sizing 
when more than one (1) hose bibb is supplied by a segment of water-distributing pipe. The fixture branch to each hose bibb shall 
be sized on the basis of two and one-half (2.5) fixture units. 



122 



WATER SUPPLY AND DISTRIBUTION 



Table 6-6 



TABLE 6-6 
Fixture Unit Table for Determining Water Pipe and Meter Sizes 



Meter Building 

and Supply 

Street and 
Service, Branches, 

Inches Inches 40 
(12) 

Pressure Range - 30 

3/4 1/2*** 6 

3/4 3/4 16 

3/4 1 29 

1 1 36 

3/4 1-1/4 36 

1 1-1/4 54 

1-1/2 1-1/4 78 

1 1-1/2 85 
1-1/2 1-1/2 150 

2 1-1/2 151 

1 2 85 
1-1/2 2 220 

2 2 370 
. 2 2-1/2 445 



Maximum Allowable Length in Feet (meters) 



60 
(18) 

to 45 

5 

16 

25 

31 

33 

47 

68 

84 

124 

129 

85 

205 

327 

418 



80 

(24) 

psi (207 

4 

14 

23 

27 

31 

42 

57 

79 
105 
129 

85 
190 
292 
390 



100 
(30) 

to 310 

3 
12 

21 

25 

28 

38 

48 

65 

91 
110 

85 
176 
265 
370 



150 200 
(46) (61) 

kPa)** 



2 
9 

17 

20 

24 

32 

38 

56 

70 

80 

85 

155 

217 

330 



1 

6 

15 
17 

23 

28 

32 

48 

57 

64 

85 

138 

185 

300 



250 300 
(76) (91) 



1 

5 
13 

15 
21 

25 

28 

43 

49 

53 

82 

127 

164 

280 



1 

5 

12 

13 

19 

23 

25 

38 

45 

46 

80 

120 

147 

265 



400 500 
(122) (152) 





4 

10 

12 

17 

19 

21 

32 

36 

38 

66 

104 

124 

240 





4 

8 

10 

16 

17 

18 

28 

31 

32 

61 

85 

96 

220 



Inch 


mm 


1/2 


15 


3/4 


20 


1 


25 


1-1/4 


32 


1-1/2 


40 


2 


50 


2-1/2 


65 



600 
(183) 



3 

6 

8 
13 
14 
15 
26 
26 
27 
57 
70 
70 
198 



700 800 
(213) (244) 



900 1000 
(274) (305) 



12 
12 
12 

22 
23 
23 
52 
61 
61 
175 




2 
6 
6 

12 
12 
12 
21 
21 
21 
49 
57 
57 
158 





2 

6 

6 

11 

11 

11 

20 

20 

20 

46 

54 

54 

143 





1 

6 

6 

11 

11 

11 

20 

20 

20 

43 

51 

51 

133 



Pressure Range - 46 to 



3/4 1/2* 



3/4 
3/4 

1 
3/4 

1 
1-1/2 

1 
1-1/2 

2 

1 
1-1/2 

2 

2 



3/4 

1 

1 
1-1/4 
1-1/4 
1-1/4 
1-1/2 
1-1/2 
1-1/2 

2 

2 

2 
2-1/2 



7 

20 

39 

39 

39 

78 

78 

85 

151 

151 

85 

370 

370 

654 



60 psi 

7 

20 

39 

39 

39 

78 

78 

85 
151 
151 

85 
370 
370 
640 



(31 7 to 

6 

19 

36 

39 

39 

76 

78 

85 
151 
151 

85 
340 
370 
610 



414 kPa)* 

5 

17 

33 

36 

39 

67 

78 

85 
151 
151 

85 
318 
370 
580 



4 
14 

28 
30 
39 

52 

66 

85 

128 

150 

85 

272 

368 

535 



3 
11 

23 

25 

39 

44 

52 

85 

105 

117 

85 

240 

318 

500 



2 

9 

21 

23 

34 

39 

44 

80 

90 

98 

85 

220 

280 

470 



19 

20 

32 

36 

39 

67 

78 

84 

85 

198 

250 

440 



1 

6 

17 

18 

27 

30 

33 

55 

62 

67 

85 

170 

205 

400 



1 

5 

14 

15 

25 

27 

29 

49 

52 

55 

85 

150 

165 

365 



1 

4 

12 

12 

22 

24 

24 

41 

42 

42 

85 

135 

142 

335 





4 

10 

10 

19 

20 

20 

37 

38 

38 

85 

123 

123 

315 




3 
9 
9 

19 

19 

19 

34 

35 

35 

85 

110 

110 

285 




3 
8 
8 

17 

17 

17 

32 

32 

32 

83 

102 

102 

267 



16 

16 
16 
30 
30 
30 
80 
94 
94 
250 



Pressure Range - Over 60 psi (414 



3/4 
3/4 
3/4 

1 
3/4 

1 
1-1/2 

1 
1-1/2 
2 
1 
1-1/2 
2 
2 



1/2*** 
3/4 

1 

1 
1-1/4 
1-1/4 
1-1/4 
14/2 
1-1/2 151 
1-1/2 151 

2 

2 

2 



7 
20 
39 
39 
39 
78 
78 
85 



85 
370 
370 



2-1/2 654 



7 

20 

39 

39 

39 

78 

78 

85 

151 

151 

85 

370 

370 

654 



7 

20 

39 

39 

39 

78 

78 

85 

151 

151 

85 

370 

370 

654 



kPa)* 

6 

20 

39 

39 

39 

78 

78 

85 
151 
151 

85 
370 
370 
654 



5 

17 

35 

38 

39 

74 

78 

85 

151 

151 

85 

360 

370 

654 



4 
13 

30 

32 

39 

62 

74 

85 

151 

151 

85 

335 

370 

650 



3 

11 

27 

29 

39 

53 

65 

85 

130 

142 

85 

305 

370 

610 



3 

10 

24 

26 

39 

47 

54 

85 

113 

122 

85 

282 

340 

570 



21 

22 

34 

39 

43 

81 

88 

98 

85 

244 

288 

510 



1 

7 

17 

18 

28 

31 

34 

64 

73 

82 

85 

212 

245 



1 

6 

14 
14 
26 
26 
26 
51 
51 
64 
85 
187 
204 



460 430 



1 

6 

13 
13 

25 

25 

25 

48 

51 

51 

85 

172 

172 

404 



1 
5 

12 

12 

23 

23 

23 

46 

46 

46 

85 

153 

153 

380 



1 

4 

12 

12 

22 

22 

22 

43 

43 

43 

85 

141 

141 

356 





4 

11 

11 

21 

21 

21 

40 

40 

40 

85 

129 

129 

329 



Available static pressure after head loss. 

Building supply, not less than three-quarter (3/4) inch (20 mm) nominal size. 



123 



Table 6-7 - Table 6-8 



UNIFORM PLUMBING CODE 



Table 6-7 

Flushometer Fixture Units for Water 

Sizing Using Table 6-5 

Fixture Category: Water Closet w/ Flushometer 
Valves 

Individual Fixture Units Assigned 

Number of Fixture Units for Water Closets and 

Flushometer Assigned in Similar 10-Unit Fixtures 

Valves Decreasing Value in Accumulative Values 



1 


40 


40 


2 


30 


70 


3 


20 


90 


4 


15 


105 


5 or more 


10 each 


115 plus 10 for each 

additional fixture 

in excess of 5 


Fixture 


Category: Urinals w/ Flushometer Valves 




Individual 


Fixture Units Assigned 


Number ol 


Fixture Units 


for Urinals and 


Flushometer Assigned in 


Similar 5-Unit Fixtures 


Valves 


Decreasing Value 


in Accumulative Values 


1 


20 


20 


2 


15 


35 


3 


10 


45 


4 


8 


53 


5 or more 


5 each 


58 plus 5 for each 

additional fixture 

in excess of 5 




TABLE 6-8 


Sizing of Residential Water Softeners 


Required Size of Number of Bathroom 


Softener Connection 


Groups Served 1 




3/4 in. 


up to 2 2 




lin. 


up to 4 3 



1 Installation of a kitchen sink and dishwasher, laundry tray, 
and automatic clothes washer permitted without additional 
size increase. 

~ An additional water closet and lavatory permitted. 

3 Over four (4) bathroom groups, the softener size shall be 
engineered for the specific installation. 

See also Appendix A, Recommended Rules for Sizing the Water 
Supply System, and Appendix L, Alternate Plumbing Systems, for 
alternate methods of sizing water supply systems. 



124 



CHAPTER 7 



SANITARY DRAINAGE 



Part I - Drainage Systems. 

701.0 Materials. 

1701.1 Materials for drainage piping shall be in accor- 
dance with one of the referenced standards in Table 
7-1 except that: 

701.1.1 No galvanized wrought-iron or galva- 
nized steel pipe shall be used underground and 
shall be kept not less than six (6) inches (152 
mm) above ground. 

701.1.2 ABS and PVC DWV piping installations 
shall be installed in accordance with applicable 

1 standards referenced in Table 14-1 and Chapter 

15 "Firestop Protection/' Except for individual 
single-family dwelling units, materials exposed 
within ducts or plenums shall have a flame- 
spread index of a maximum of twenty-five (25) 
and a smoke-developed index of a maximum 
fifty (50), when tested in accordance with the 
Test for Surface-Burning Characteristics of the 
Building Materials. (See the Building Code stan- 
dards based on ASTM E84 and UL 723). 

701.1.3 No vitrified clay pipe or fittings shall be 
used above ground or where pressurized by a 
pump or ejector. They shall be kept not less than 
twelve (12) inches (305 mm) below ground. 

701.1.4 Copper tube for drainage and vent 
piping shall have a weight of not less than that 
of copper drainage tube type DWV. 

701.1.5 Stainless steel 304 pipe and fittings shall 
not be installed underground and shall be kept 
not less than six (6) inches (152 mm) above ground. 

701 .1 .6 Cast-iron soil pipe and fittings shall be 
listed and tested to comply with standards refer- 
enced in Table 14-1. Such pipe and fittings shall 
be marked with country of origin and identifica- 
tion of the original manufacturer in addition to 
any markings required by referenced standards. 

701.2 Materials for drainage fittings shall be in 
accordance with the applicable standards referenced 
in Table 7-1 of the same diameter as the piping 
served, and such fittings shall be compatible with the 
type of pipe used. 

701.2.1 Fittings on screwed pipe shall be of the 
recessed drainage type. Burred ends shall be 
reamed to the full bore of the pipe. 

701 .2.2 The threads of drainage fittings shall be 
tapped so as to allow one-fourth (1/4) inch per 
foot (20.8 mm/m) grade. 

701 .2.3 Fittings used for drainage shall be of the 
drainage type, have a smooth interior water- 



way, and be constructed so as to allow one- 
fourth (1 /4) inch per foot (20.8 mm/m) grade. 

701.3 Lead. See Table 14-1. Sheet lead shall be not 
less than the following: 

For safe pans - not less than four (4) pounds per 
square foot (19.5 kg/m 2 ) or one-sixteenth (1/16) inch 
(1.6 mm) thick. 

For flashings or vent terminals - not less than 
three (3) pounds per square foot (14.6 kg/m 2 ) or 
0.0472 inches (1.2 mm) thick. 

Lead bends and lead traps shall be not less than 
one-eighth (1/8) inch (3.2 mm) wall thickness. 

701.4 Ferrules and Bushings. 

701.4.1 Caulking ferrules shall be manufactured 
from bronze or copper and shall be in accor- 
dance with Table 7-2 (a). 

701 .4.2 Soldering bushings shall be of bronze or 
copper in accordance with Table 7-2(b). 

TABLE 7-2(a) 
Caulking Ferrules 



Pipe Size 
(inches) 



Inside 
Diameter 
(inches) 



2-1/4 
3-1/4 

4-1/4 



4-1/2 
44/2 

4-1/2 




12 



Caulking Ferrules (Metric) 



Pipe Size 
(mm) 



Inside 

Diameter 

(mm) 



50 
80 
100 



57 
83 
108 



114 
114 
114 



0.454 
0.790 
1.132 



TABLE 7-2(b) 
Soldering Bushings 



Pipe Size 
(inches) 



Minimum 

Weight Each 

lb. oz. 



Pipe Size 
(inches) 



1-1/4 

1-1/2 

2 



6 
8 
14 



2-1/2 
3 
4 



Soldering Bushings (Metric) 



32 0.168 65 

40 0.224 80 

50 0.392 100 



0.622 

0.908 
1.586 



Length Minimum Weight Each 
(inches) lb. oz. 



Length Minimum Weight Each 
(mm) (kg) 



Minimum Weight 

Each 

lb. oz. 



Pipe Size ... . . x _ . Pipe Size Minimum Weight Each 
/L * Weight Each \ . „ * 

(mm) * < mm ) < k 9) 



125 



Table 7-1 



UNIFORM PLUMBING CODE 



TABLE 7-1 
Materials for Drain, Waste, Vent Pipe and Fittings 



Material 


Underground 

Drain, Waste, 

Vent Pipe and 

Fittings 


Above ground 

Drain, Waste, 

Vent Pipe and 

Fittings 


Building 
Sewer Pipe 
and Fittings 


Referenced 

Standard(s) 

Pipe 


Referenced 

Standard(s) 

Fittings 


ABS (Schedule 
40) 


X 


X 


X 


ASTM D1527, 
ASTM D2661, 
ASTM D2680 1 , 
ASTM F628 


ASTM D2661, 
ASTM D2680 1 


Asbestos- 
Cement 






X 


ASTM C428 1 , 
ASTM C14 1 




Brass 




X 




ASTM B43 




Cast-iron 


X 


X 


X 


ASTM A74, 
ASTM A888, 
CISPI 301 


ASME B16.12, 
ASTM A74, 
ASTM A888, 
CISPI 301 


Co-Extruded 
ABS (Schedule 
40) 


X 


X 


X 


ASTM F1488 


ASTM, D2661, 
ASTM D2680 1 


Co-Extruded 
PVC (Schedule 
40) 


X 


X 


X 


ASTM F1488, 
ASTM F891 


ASTM D2665, 
ASTM F794 1 , 
ASTM F1866 


Copper (Type 
DWV) 


X 


X 


X 


ASTM B75, 
ASTM B251, 
ASTM B302, 
ASTM B306 


ASME B16.23, 
ASME B16.29 


Galvanized 
Malleable Iron 




X- 






ASME B16.3 


Galvanized 
Steel 




X 




ASTM A53 




PVC (Schedule 
40) 


X 


X 


X 


ASTM D1785, 
ASTM D2665, 
ASTM F794 1 


ASTM D2665, 
ASTM F794 1 , 
ASTM F1866 


Stainless Steel 
304 




X 




ASMEA112.3.1 


ASME Al 12.3.1 


Stainless Steel 
316L 


X 


X 


X 


ASMEA1 12.3.1 


ASME A112.3.1 


Vitrified Clay 
(Extra strength) 






X 


ASTM C700 


ASTM C700 



1 For Building Sewer applications. 



126 



SANITARY DRAINAGE 



702.0-705.1 



702.0 Fixture Unit Equivalents. 

I 702.1 The unit equivalent of plumbing fixtures 
shown in Table 7-3 shall be based on the size of the 
trap required, and the unit equivalent of fixtures and 
devices not shown in Table 7-3 shall be based on the 

I size of trap or trap arm. 

I Maximum drainage fixture units for a fixture 

trap and trap arm loadings for sizes up to four (4) 
inches (100 mm) are as follows: 



Size of Trap and 
Trap Arm 

1-1/4 in. (32 mm) 


Drainage Fixture 
Unit Values (DFU) 

1 unit 


1-1/2 in. (40 mm) 


3 units 


2 in. (50 mm) 


4 units 


3 in. (80 mm) 


6 units 


4 in. (100 mm) 


8 units 



Exception: On self-service laundries. 

702.2 Drainage fixture units for intermittent flow 
into the drainage system shall be computed on the 
rated discharge capacity in gpm (gallons per minute) 
(liters per second) in accordance with Table 7-4. 

702.3 For a continuous flow into a drainage system, 
such as from a pump, sump ejector, air conditioning 
equipment or similar device, two (2) fixture units 
shall be allowed for each gallon per minute (3.78 
L/m) of flow. 

TABLE 7-4 
Discharge Capacity in Gallons per Minute 

(Liters per Second) 

For Intermittent Flow Only 



GPM 


(Usee) 


Up to 7-1/2 


Up to 0.47 


Equals 1 Fixture 
Unit 


Greater than 
7-1/2 to 15 


(0.47 to 0.95) 


Equals 2 Fixture 
Units 


Greater than 
15 to 30 


(0.95 to 1.89) 


Equals 4 Fixture 
Units 


Greater than 
30 to 50 


(1.89 to 3.15) 


Equals 6 Fixture 
Units 



Note: Discharge capacity exceeding 50 gallons per minute (3.15L/sec.) 
shall be determined by the Authority Having Jurisdiction. 

703.0 Size of Drainage Piping. 

703.1 The minimum sizes of vertical and /or hori- 
zontal drainage piping shall be determined from the 
total of fixture units connected thereto, and addition- 
ally, in the case of vertical drainage pipes, in accor- 
dance with their length. 

703.2 Table 7-5 shows the maximum number of 
fixture units allowed on any vertical or horizontal 
drainage pipe, building drain, or building sewer of a 
given size; the maximum number of fixture units 
allowed on any branch interval of a given size; and 



the maximum length (in feet and meters) of any 
vertical drainage pipe of a given size. 
703.3 For alternate method of sizing drainage piping, 
see Appendix L. 

704.0 Fixture Connections (Drainage). 

704.1 Drainage piping shall be provided with 
approved inlet fittings for fixture connections, 
correctly located according to the size and type of 
fixture proposed to be connected. 

704.2 Two (2) fixtures set back-to-back, or side-by- 
side, within the distance allowed between a trap and 
its vent shall be permitted to be served by a single 
vertical drainage pipe provided that each fixture 
wastes separately into an approved double-fixture 
fitting having inlet openings at the same level. 

704.3 Pot sinks, scullery sinks, dishwashing sinks, 
silverware sinks, commercial dishwashing machines, 
silverware-washing machines, and other similar 
fixtures shall be connected directly to the drainage 
system. A floor drain shall be provided adjacent to 
the fixture, and the fixture shall be connected on the 
sewer side of the floor drain trap, provided that no 
other drainage line is connected between the floor 
drain waste connection and the fixture drain. The 
fixture and floor drain shall be trapped and vented 
as required by this code. 

705.0 Joints and Connections. 

705.1 Types of Joints. 

705.1.1 Caulked Joints. Caulked joints for cast- 
iron bell-and-spigot soil pipe and other similar 
joints shall be firmly packed with oakum or 
hemp and filled with molten lead to a depth of 
not less than one (1) inch (25.4 mm). The lead 
shall be caulked thoroughly at the inside and 
outside edges of the joint. After caulking, the 
finished joint shall not exceed one-eighth (1/8) 
inch (3.2 mm) below the rim of the hub. No 
paint, varnish, or other coatings shall be 
permitted on the joining material until after the 
joint has been tested and approved. Caulked 
joints in cast-iron bell-and-spigot water piping 
shall be made with nontoxic materials. 

705.1.2 Cement Mortar Joints. Except for repairs 
and connections to existing lines constructed 
with such joints, cement mortar joints shall be 
prohibited on building sewers. 

705.1.3 Burned Lead Joints. Burned (welded) 
lead joints shall be lapped, and the lead shall be 
fused together to form a uniform weld not less 
than as thick as the lead being joined. 

705.1.4 Asbestos Cement Sewer Pipe Joints. 
Joints in asbestos cement pipe shall be a sleeve 
coupling of the same composition as the pipe or 
of other approved materials, and sealed with 



127 



Table 7-3 



UNIFORM PLUMBING CODE 



TABLE 7-3 
Drainage Fixture Unit Values (DFU) 



Plumbing Appliance, Appurtenance, or Fixture 



Min. Size 

Trap and 

Trap Arm 



Inch 


mm 


1-1/4 


32 


1-1/2 


40 


2 


51 


2-1/2 


65 


3 


80 



Private 



Public 



Assembly 8 



Bathtub or Combination Bath /Shower. 

Bidet 

Bidet 



1- 

1- 

1- 

Clothes Washer, domestic, standpipe 5 

Dental Unit, cuspidor 1- 

Dishwasher, domestic, with independent drain 1- 

Drinking Fountain or Water Cooler 1- 

Food- Waste-Grinder, commercial 

Floor Drain, emergency 

Floor Drain (for additional sizes see Section 702) 

Shower, single-head trap 

Multi-head, each additional 

Lavatory, single 1- 

Lavatory, in sets of two or three 1- 

Washfountain , 1- 

Washfountain 

Mobile Home, trap 

Receptor, indirect waste 1,3 1- 

Receptor, indirect waste 1,4 

Receptor, indirect waste 1 

Sinks 

Bar 1 

Bar 2 1 

Clinical 

Commercial with food waste 2 1- 

Special Purpose 2 1- 

Special Purpose 

Special Purpose 

Kitchen, domestic 2 1 

(with or without food-waste grinder and /or dishwasher) 

| Laundry 2 1 

(with or without discharge from a. clothes washer) 

Service or Mop Basin 

Service or Mop Basin 

Service, flushing rim 

Wash, each set of faucets 

Urinal, integral trap 1.0 GPF 2 

Urinal, integral trap greater than 1.0 GPF 

Urinal, exposed trap 2 1 

Water Closet, 1.6 GPF Gravity Tank 6 

Water Closet, 1.6 GPF Flushometer Tank 6 .... 

Water Closet, 1.6 GPF Flushometer Valve 6 ... 

Water Closet, greater than 1.6 GPF Gravity Tank 6 

Water Closet, greater than 1.6 GPF Flushometer Valve 6 



1/2" 
1/4" 
1/2" 
2" 

1/4" 
1/2" 
1/4" 
2" 
2" 
2" 
T 
T 

1/4" 
1/2" 
1/2" 
2" 
3" 

1/2" 
2" 
3" 

■1/2" 
■1/2" 
3" 
•1/2" 

■1/2" 
T 
3" 
■1/2" 

■1/2" 

2" 
3" 
3" 

2" 
2" 

-1/2" 
3" 
3" 
3" 
3" 
3" 



2.0 
1.0 
2.0 
3.0 

2.0 
0.5 



2.0 
2.0 
1.0 
1.0 
2.0 



12.0 

1.0 

2.0 
3.0 

2.0 

2.0 



2.0 



2.0 
2.0 
2.0 
3.0 
3.0 
3.0 
4.0 
4.0 



3.0 


3.0 


1.0 


1.0 


2.0 


2.0 


0.5 


1.0 


3.0 


3.0 


0.0 


0.0 


2.0 


2.0 


2.0 


2.0 


1.0 


1.0 


1.0 


1.0 


2.0 


2.0 


2.0 


2.0 


3.0 


3.0 


See footnote 1,3 




See footnote 1,4 




See footnote 1 




2.0 


2.0 


6.0 


6.0 


3.0 


3.0 


3.0 


3.0 


4.0 


4.0 


6.0 


6.0 


2.0 





2.0 

3.0 
3.0 
6.0 
2.0 
2.0 
2.0 
2.0 
4.0 
4.0 
4.0 
6.0 
6.0 



2.0 

3.0 
3.0 
6.0 
2.0 
5.0 
6.0 
5.0 
6.0 
6.0 
6.0 
8.0 
8.0 



Indirect waste receptors shall be sized based on the total drainage capacity of the fixtures that drain therein to, in accordance with Table 7-4. 
"" Provide a two (2) inch (51 mm) minimum drain. 
" For refrigerators, coffee urns, water stations, and similar low demands. 

For commercial sinks, dishwashers, and similar moderate or heavy demands. 

Buildings having a clothes-washing area with clothes washers in a battery of three (3) or more clothes washers shall be rated at six (6) fixture units 

each for purposes of sizing common horizontal and vertical drainage piping. 

Water closets shall be computed as six (6) fixture units when determining septic tank sizes based on Appendix K of this code. 

7 Trap sizes shall not be increased to the point where the fixture discharge may be inadequate to maintain their self-scouring properties. 

8 Assembly [Public Use (See Table 4-1)]. 



128 



SANITARY DRAINAGE 



Table 7-5 - 705.2 



TABLE 7-5 
Maximum Unit Loading and Maximum Length of Drainage and Vent Piping 



Size of Pipe, inches 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


5 


6 


8 


10 


12 


(mm) 


(32) 


(40) 


(50) 


(65) 


(80) 


(100) 


(125) 


(150) 


(200) 


(250) 


(300) 


Maximum Units 
























Drainage Piping 1 
























Vertical 


1 


2 2 


16 3 


32 3 


48 4 


256 


600 


1,380 


3,600 


5,600 


8,400 


Horizontal 


1 


1 


8 J 


14 3 


35 4 


216 5 


428* 


720 5 


2,640* 


4,680 s 


8,200 s 


Maximum Length 
























Drainage Piping 
























Vertical, feet 


45 


65 


85 


148 


212 


300 


390 


510 


750 






(m) 


(14) 


(20) 


(26) 


(45) 


(65) 


(91) 


(119) 


(155) 


(228) 






Horizontal (unlimited) 
























Vent Piping (See note) 






















Horizontal and Vertical 
























Maximum Units 


1 


8 J 


24 


48 


84 


256 


600 


1,380 


3,600 






Maximum Lengths, feet 


45 


60 


120 


180 


212 


300 


390 


510 


750 






(m) 


(14) 


(18) 


(37) 


(55) 


(65) 


(91) 


(119) 


(155) 


(229) 







Excluding trap arm. 

Except sinks, urinals, and dishwashers — exceeding one (1) fixture unit. 
° Except six-unit traps or water closets. 

Only four (4) water closets or six-unit traps allowed on any vertical pipe or stack; and not to exceed three (3) water closets or 
six-unit traps on any horizontal branch or drain. 

Based on one-fourth (1/4) inch per foot (20.8 mm/m) slope. For one-eighth (1/8) inch per foot (10.4 mm/m) slope, multiply 
horizontal fixture units by a factor of eight-tenths (0.8). 

Note: The diameter of an individual vent shall be not less than one and one-fourth (1-1/4) inches (32 mm) nor less than one-half 
(1/2) the diameter of the drain to which it is connected. Fixture unit load values for drainage and vent piping shall be computed 
from Tables 7-3 and 7-4. Not to exceed one-third (1/3) of the total permitted length of any vent may be installed in a horizontal 
position. When vents are increased one (1) pipe size for their entire length, the maximum length limitations specified in this table 
do not apply. This table complies with the requirements of Section 901.2. 



rubber rings or joined by an approved-type 
compression coupling. Joints between asbestos 
cement pipe and other approved pipe shall be 
made by means of an approved adapter 
coupling. 

705.1.5 Packing Additives Prohibited. The 

addition of leak-sealing additives to joint 
packing shall be prohibited. 

705.1.6 Molded Rubber Coupling Joints. When 
pipe is joined by means of molded rubber 
coupling joints, such joints shall conform to 
approved standards and shall not be considered 
as slip joints. When required, appropriate rubber 
bushings shall be used to allow for any differ- 
ence in piping material diameters. 

705.1.7 Elastomeric Gasketed and Rubber-Ring 
Joints. Elastomeric gasketed and rubber-ring 
joints shall comply with the applicable standards 
referenced in Table 14-1. 

705.1.8 Shielded Coupling Joints. When piping 
systems are joined by means of shielded 
couplings, such couplings shall conform to 
approved standards and shall not be considered 
as slip joints. 



705.1.9 Hubless Cast-Iron Pipe Joints. Joints for 
hubless cast-iron soil pipe and fittings shall 
conform to applicable standards referenced in 
Table 14-1 and shall not be considered as slip 
joints. I 

705.2 Use of Joints. 

705.2.1 Clay and Sewer Pipe. Joints in vitrified 
clay pipe or between such pipe and metal pipe 
shall be made as provided in Sections 316.1.5, 
705.1.6, 705.1.7, or 705.1.8. 

705.2.2 Cast-Iron Pipe. Joints in cast-iron pipe 
shall be made as provided in Sections 316.1.2, 
316.1.5, 705.1.1,705.1.8, or 705.1.9. 

705.2.3 Screw Pipe to Cast-iron. Joints between 
wrought iron, steel, brass, or copper pipe and 
cast-iron pipe shall be either caulked or threaded 
joints made as provided in Section 316.1.1 or 
705.1.1, or shall be made with approved adapter 
fittings. 

705.2.4 Lead to Cast-iron, Wrought-lron, or Steel. 

Joints between lead and cast-iron, wrought-iron, 
or steel pipe shall be made by means of wiped 
joints to a caulking ferrule, soldering nipple, or 
bushing as provided in Section 316.1.2. 



129 



705.3-707.6 



UNIFORM PLUMBING CODE 



705.3 Special Joints. 

705.3.1 Slip Joints. In fixture drains and traps, 
slip joints of approved materials shall be 
permitted to be used in accordance with their 
approvals. 

705.3.2 Expansion Joints. Expansion joints shall 
be accessible, except when in vent piping or 
drainage stacks, and shall be permitted to be 
used where necessary to provide for expansion 
and contraction of the pipes. 

705.3.3 Ground Joint, Flared, or Ferrule 
Connections. Brass or copper ground joint, 
flared, or ferrule-type connections that allow 
adjustment of tubing, but provide a rigid joint 
when made up, shall not be considered as slip 
joints. 

706.0 Changes in Direction of Drainage Flow. 

706.1 Changes in direction of drainage piping shall 
be made by the appropriate use of approved fittings 
and shall be of the angles presented by a one- 
sixteenth (1/16) bend, one-eighth (1/8) bend, or one- 
sixth (1/6) bend, or other approved fittings of equiv- 
alent sweep. 

706.2 Horizontal drainage lines, connecting with a 
vertical stack, shall enter through 45 degree (0.79 
rad) wye branches, 60 degree (1.05 rad) wye 
branches, combination wye and one-eighth (1/8) 
bend branches, sanitary tee or sanitary tapped tee 
branches, or other approved fittings of equivalent 
sweep. No fitting having more than one (1) inlet at 
the same level shall be used unless such fitting is 
constructed so that the discharge from one (1) inlet 
cannot readily enter any other inlet. Double sanitary 
tees shall be permitted to be used when the barrel of 
the fitting is not less than two (2) pipe sizes larger 
than the largest inlet, (pipe sizes recognized for this 
purpose are 2 in., 2-1/2 in., 3 in., 3-1/2 in., 4 in., 4-1/2 
in., 5 in., 6 in., etc.) (50, 65, 80, 90, 100, 115, 125, 150 
mm, etc.). 

706.3 Horizontal drainage lines connecting with 
other horizontal drainage lines shall enter through 45 
degree (0.79 rad) wye branches, combination wye 
and one-eighth (1/8) bend branches, or other 
approved fittings of equivalent sweep. 

706.4 Vertical drainage lines connecting with hori- 
zontal drainage lines shall enter through 45 degree 
(0.79 rad) wye branches, combination wye and one- 
eighth (1/8) bend branches, or other approved fittings 
of equivalent sweep. Branches or offsets of 60 degrees 
(1.05 rad) shall be permitted to be used only when 
installed in a true vertical position. 



707.0 Cleanouts. 

707.1 Each cleanout fitting for cast-iron pipe shall 
consist of a cast-iron or brass body and an approved 
plug. Each cleanout for galvanized wrought-iron, 
galvanized steel, copper, or brass pipe shall consist of 
a brass plug as specified in Table 7-6, or a standard 
weight brass cap, or an approved ABS or PVC plastic 
plug, or an approved stainless steel cleanout or plug. 
Plugs shall have raised square heads or approved 
countersunk rectangular slots. 

707.2 Each cleanout fitting and each cleanout plug or 
cap shall be of an approved type. 

707.3 Cleanouts shall be designed to be gas and 
water-tight. 

707.4 Each horizontal drainage pipe shall be provided 
with a cleanout at its upper terminal, and each run of 
piping, that is more than one-hundred (100) feet 
(30,480 mm) in total developed length, shall be 
provided with a cleanout for each one-hundred (100) 
feet (30,480 mm), or fraction thereof, in length of such 
piping. An additional cleanout shall be provided in a g 
drainage line for each aggregate horizontal change of I 
direction exceeding 135 degrees (2.36 rad). | 

Exceptions: 

(1) Cleanouts shall be permitted to be omitted on 
a horizontal drain line less than five (5) feet 
(1,524 mm) in length unless such line is 
serving sinks or urinals. 

(2) Cleanouts shall be permitted to be omitted on 
any horizontal drainage pipe installed on a 
slope of 72 degrees (1.26 rad) or less from the 
vertical angle (one-fifth (1/5) bend). 

(3) Excepting the building drain and its hori- 
zontal branches, a cleanout shall not be 
required on any pipe or piping that is above 
the floor level of the lowest floor of the 
building. 

(4) An approved type of two-way cleanout 
fitting, installed inside the building wall near 
the connection between the building drain 
and the building sewer or installed outside of 
a building at the lower end of a building 
drain and extended to grade, shall be 
permitted to be substituted for an upper 
terminal cleanout. 

707.5 Each cleanout shall be installed so that it opens 
to allow cleaning in the direction of flow of the soil or 
waste or at right angles thereto and, except in the case 
of wye branch and end-of-line cleanouts, shall be 
installed vertically above the flow line of the pipe. 

707.6 Each cleanout extension shall be considered as 
drainage piping and each 90 degree (1.6 rad) 



130 



SANITARY DRAINAGE 



707.6 - Table 7-6 



cleanout extension shall be extended from a wye- 
type fitting or other approved fitting of equivalent 
sweep. 

707.7 Each cleanout for an interceptor shall be outside 
of such interceptor. 

707.8 Each cleanout, unless installed under an 
approved cover plate, shall be above grade, readily 
accessible, and so located as to serve the purpose for 
which it is intended. Cleanouts located under cover 
plates shall be so installed as to provide the clearances 
and accessibility required by this section. 

707.9 Each cleanout in piping two (2) inches (50 mm) 
or less in size shall be so installed that there is a clear- 
ance of not less than twelve (12) inches (305 mm) in 
front of the cleanout. Cleanouts in piping exceeding 
two (2) inches (50 mm) shall have a clearance of not 
less than eighteen (18) inches (457 mm) in front of the 
cleanout. Cleanouts in under-floor piping shall be 
extended to or above the finished floor or shall be 
extended outside the building when there is less than 
eighteen (18) inches (457 mm) vertical overall, 
allowing for obstructions such as ducts, beams, and 
piping, and thirty (30) inches of (762 mm) horizontal 
clearance from the means of access to such cleanout. 
No under-floor cleanout shall be located exceeding 
twenty (20) feet (6,096 mm) from an access door, trap 
door, or crawl hole. 

707.10 Cleanout fittings shall be not less in size than 
those given in Table 7-6. 

707.11 Cleanouts shall be provided for pressure 
drainage systems as classified under Section 710.7. 

707.12 Countersunk cleanout plugs shall be installed 
where raised heads cause a hazard. 

707.13 When a hubless blind plug is used for a 
required cleanout, the complete coupling and plug 
shall be accessible for removal or replacement. 

1707.14 Cleanouts for trap arms shall be installed in 
accordance with Section 1002.3. 

708.0 Grade of Horizontal Drainage Piping. 

Horizontal drainage piping shall be run in practical 
alignment and a uniform slope of not less than one- 
fourth (1/4) inch per foot (20.8 mm/m) or 2 percent 
toward the point of disposal provided that, where it 
is impractical due to the depth of the street sewer, to 
the structural features, or to the arrangement of any 
building or structure to obtain a slope of one-fourth 
(1/4) of an inch per foot (20.8 mm/m) or 2 percent, 
any such pipe or piping four (4) inches (100 mm) or 
larger in diameter may have a slope of not less than 
one-eighth (1/8) of an inch per foot (10.4 mm/m) or 
1 percent, when first approved by the Authority 
Having Jurisdiction. 



709.0 Gravity Drainage Required. 

Wherever practicable, plumbing fixtures shall be 
drained to the public sewer or private sewage 
disposal system by gravity. 

710.0 Drainage of Fixtures Located Beiow the Next 
Upstream Manhole or Below the Main Sewer Level. 

710.1 Where a fixture is installed on a floor level that 
is lower than the next upstream manhole cover of the 
public or private sewer, serving such drainage 
piping, shall be protected from backflow of sewage 
by installing an approved type of backwater valve. 
Fixtures on floor levels above such elevation shall 
not discharge through the backwater valve. 
Cleanouts for drains that pass through a backwater 
valve shall be clearly identified with a permanent 
label stating "backwater valve downstream". 

710.2 Drainage piping serving fixtures that are 
located below the crown level of the main sewer 
shall discharge into an approved water-tight sump 
or receiving tank, so located as to receive the sewage 
or wastes by gravity. From such sump or receiving 
tank, the sewage or other liquid wastes shall be lifted 
and discharged into the building drain or building 
sewer by approved ejectors, pumps, or other equally 
efficient approved mechanical devices. 

710.3 A sewage ejector or sewage pump receiving 
the discharge of water closets or urinals: 

710.3.1 Shall/have a discharge capacity of not 
less than 20 gallons per minute (75.7 L/m). 

710.3.2 In single dwelling units, the ejector or 
pump shall be capable of passing a one and one- 
half (1-1/2) inch (38 mm) diameter solid ball, 
and the discharge piping of each ejector or pump 

TABLE 7-6 
Cleanouts 



Size of Pipe 


Size of Cleanout 


Threads 


(inches) 


(inches) 


(per inches) 


1-1/2 


14/2 


11-1/2 


2 


1-1/2 


11-1/2 


2-1/2 


2-1/2 


8 


3 


2-1/2 


8 


4 & larger 


3-1/2 


8 




TABLE 7-6 






Cleanouts (Metric) 




Size of Pipe 


Size of Cleanout 


Threads 


(mm) 


(mm) 


(per 25.4 mm) 


40 


40 


11-1/2 


50 


40 


11-1/2 


65 


65 


8 


80 


65 


8 


100 & larger 


90 


8 



131 



710.3-710.13 



UNIFORM PLUMBING CODE 



shall have a backwater valve and gate valve, and 
be not less than of two (2) inches (50 mm) in 
diameter. 

710.3.3 In other than single-dwelling units, the 
ejector or pump shall be capable of passing a two 
(2) inch (51 mm) diameter solid ball, and the 
discharge piping of each ejector or pump shall 
have a backwater valve and gate valve, and be 
not less than three (3) inches (80 mm) in diameter. 

710.4 The discharge line from such ejector, pump, or 
other mechanical device shall be provided with an 
accessible backwater or swing check valve and gate or 
ball valve. If the gravity drainage line to which such 
discharge line connects is horizontal, the method of 
connection shall be from the top through a wye 
branch fitting. The gate or ball valve shall be located 
on the discharge side of the backwater or check valve. 

Gate or ball valves, when installed in drainage 
piping, shall be fullway type with working parts of 
corrosion-resistant metal. Sizes four (4) inches (100 
mm) or more in diameter shall have cast-iron bodies, 
and sizes less than four (4) inches (100 mm), cast-iron 
or brass bodies. 

710.5 Building drains or building sewers receiving 
discharge from any pump or ejector shall be 
adequately sized to prevent overloading. Two (2) 
fixture units shall be allowed for each gallon per 
minute (3.78 L/m) of flow. 

710.6 Backwater valves, gate valves, fullway ball 
valves, unions, motors, compressors, air tanks, and 
other mechanical devices required by this section shall 
be located where they will be accessible for inspection 
and repair at all times and, unless continuously 
exposed, shall be enclosed in a masonry pit fitted with 
an adequately sized removable cover. 

Backwater valves shall have bodies of cast-iron, 
plastic, brass, or other approved materials; shall have 
noncorrosive bearings, seats, and self-aligning discs; 
and shall be constructed so as to ensure a positive 
mechanical seal. Such backwater valves shall remain 
sufficiently open during periods of low flows to avoid 
screening of solids and shall not restrict capacities or 
cause excessive turbulence during peak loads. Unless 
otherwise listed, valve access covers shall be bolted 
type with gasket, and each valve shall bear the manu- 
facturer's name cast into the body and the cover. 

710.7 The drainage and venting systems, in connec- 
tion with fixtures, sumps, receiving tanks, and 
mechanical waste-lifting devices, shall be installed 
under the same requirements as provided for in this 
code for gravity systems. 

710.8 Sumps and receiving tanks shall be water-tight 
and shall be constructed of concrete, metal, or other 



approved materials. If constructed of poured concrete, 
the walls and bottom shall be adequately reinforced 
and designed to recognized acceptable standards. 
Metal sumps or tanks shall be of such thickness as to 
serve their intended purpose and shall be treated 
internally and externally to resist corrosion. 

710.9 Such sumps and receiving tanks shall be auto- 
matically discharged and, when in any "public use" 
occupancy, shall be provided with dual pumps or 
ejectors arranged to function alternately in normal use 
and independently in case of overload or mechanical 
failure. The pumps shall have an audio and visual 
alarm, readily accessible, that signals pump failure or 
an overload condition. The lowest inlet shall have a 
clearance of not less than two (2) inches (51 mm) from 
the high-water or "starting" level of the sump. 

710.10 Sumps and receiving tanks shall be provided 
with substantial covers having a bolt-and-gasket- type 
manhole or equivalent opening to permit access for 
inspection, repairs, and cleaning. The top shall be 
provided with a vent pipe that shall extend separately 
through the roof or, where permitted, be combined 
with other vent pipes. Such vent shall be large enough 
to maintain atmospheric pressure within the sump 
under normal operating conditions and, in no case, 
shall be less in size than that required by Table 7-5 for 
the number and type of fixtures discharging into the 
sump, nor less than one and one-half (1-1/2) inches 
(40 mm) in diameter. When the foregoing require- 
ments are met and the vent, after leaving the sump, is 
combined with vents from fixtures discharging into 
the sump, the size of the combined vent need not 
exceed that required for the total number of fixtures 
discharging into the sump. No vent from an air-oper- 
ating sewage ejector shall combine with other vents. 

710.11 Air tanks shall be so proportioned as to be of 
equal cubical capacity to the ejectors connected there- 
with in which there shall be maintained an air pres- 
sure of not less than two (2) pounds for each foot (3 
kg for each m) of height the sewage is to be raised. No 
water-operated ejectors shall be permitted. 

710.12 Grinder Pump Ejector. Grinder pumps shall be 
permitted to be used. 

710.12.1 Discharge Piping. The discharge piping 
shall be sized per the manufacturer's instructions 
and shall be not less than one and one-fourth (1- 
1/4) inches (32 mm) in diameter. A check valve 
and fullway-type shutoff valve shall be located 
within the discharge line. 

710.13 Macerating Toilet Systems. Listed macerating 
toilet systems shall be permitted as an alternate to a 
sewage pump system when approved by the 
Authority Having Jurisdiction. 



132 



SANITARY DRAINAGE 



710.13-713.5 



710.13.1 Sumps. The sump shall be water- and 
gas-tight. 

710.13.2 Discharge Piping. The discharge piping 
shall be sized per manufacturer's instructions and 
shall be not less than three-quarter (3/4) inches 
(20 mm) in diameter. The developed length of the 
discharge piping shall not exceed the manufac- 
turer's recommendations. A check valve and 
fullway-type shutoff valve shall be located within 
the discharge line or internally within the device. 

710.13.3 Venting. The plumbing fixtures that 
discharge into the macerating device shall be 
vented per this code. The sump shall be vented 
per manufacturer's instructions and such vent 
shall be permitted to connect to the fixture 
venting. 

711.0 Suds Relief. 

Drainage connections shall not be made into a 
drainage piping system within eight (8) feet (2,438 
mm) of any vertical to horizontal change of direction 
of a stack containing suds-producing fixtures. Bath- 
tubs, laundries, washing machine standpipes, kitchen 
sinks, and dishwashers shall be considered suds- 
producing fixtures. Where parallel vent stacks are 
required, they shall connect to the drainage stack at a 
point eight (8) feet (2,438 mm) above the lowest point 
of the drainage stack. 

Exceptions: 

(1) Single-family residences. 

(2) Stacks receiving the discharge from less than 
three (3) stories of plumbing fixtures. 

712.0 Testing. 

712.1 Media. The piping of the plumbing, drainage, 
and venting systems shall be tested with water or air 
except that plastic pipe shall not be tested with air. 
The Authority Having Jurisdiction shall be permitted 
to require the removal of any cleanouts, etc., to ascer- 
tain whether the pressure has reached all parts of the 
system. After the plumbing fixtures have been set and 
their traps filled with water, they shall be submitted 
to a final test. 

712.2 Water Test. The water test shall be applied to 
the drainage and vent systems either in its entirety 
or in sections. If the test is applied to the entire 
system, openings in the piping shall be tightly 
closed, except the highest opening, and the system 
filled with water to point of overflow. If the system 
is tested in sections, each opening shall be tightly 
plugged, except the highest opening of the section 
under test, and each section shall be filled with 
water, but no section shall be tested with less than a 
ten (10) foot (3>048 mm) head of water. In testing 



successive sections, not less than the upper ten (10) 
feet (3,048 mm) of the next preceding section shall 
be tested, so that no joint or pipe in the building 
(except the uppermost ten (10) feet (3,048 mm) of 
the system) shall have been submitted to a test of 
less than a ten (10) foot (3,048 mm) head of water. 
The water shall be kept in the system, or in the 
portion under test, for not less than fifteen (15) 
minutes before inspection starts. The system shall 
then be tight at points. 

712.3 Air Test. The air test shall be made by 
attaching an air compressor testing apparatus to any 
suitable opening and, after closing all other inlets 
and outlets to the system, forcing air into the system 
until there is a uniform gauge pressure of five (5) 
pounds per square inch (34.5 kPa) or sufficient to 
balance a column of mercury ten (10) inches (254 
mm) in height. The pressure shall be held without 
introduction of additional air for a period of not less 
than fifteen (15) minutes. 

Part II - Building Sewers. 

713.0 Sewer Required. 

713.1 Every building in which plumbing fixtures are 
installed and every premises having drainage piping 
thereon shall have a connection to a public or private 
sewer, except as provided in Sections 101.4.1.3, 713.2, 

and 713.4. 

713.2 When no public sewer intended to serve any 
lot or premises is available in any thoroughfare or 
right of way abutting such lot or premises, drainage 
piping from any building or works shall be 
connected to an approved private sewage disposal 
system. 

713.3 Within the limits prescribed by Section 713.4 
hereof, the rearrangement or subdivision into smaller 
parcels of a lot that abuts and is served by a public 
sewer shall not be deemed cause to permit the 
construction of a private sewage disposal system, and 
plumbing or drainage systems on any such smaller 
parcel or parcels shall connect to the public sewer. 

713.4 The public sewer shall be permitted to be 
considered as not being available when such public 
sewer or any building or any exterior drainage facility 
connected thereto is located more than two-hundred 
(200) feet (61 m) from any proposed building or exte- 
rior drainage facility on any lot or premises that abuts 
and is served by such public sewer. 

713.5 No permit shall be issued for the installation, 
alteration, or repair of any private sewage disposal 
system, or part thereof, on any lot for which a 
connection with a public sewer is available. 



133 



713.6-718.3 



UNIFORM PLUMBING CODE 



713.6 On every lot or premises hereafter connected 
to a public sewer, all plumbing and drainage systems 
or parts thereof on such lot or premises shall be 
connected with such public sewer. 

Exception: Single-family dwellings and build- 
ings or structures accessory thereto, existing and 
connected to an approved private sewage 
disposal system prior to the time of connecting 
the premises to the public sewer shall be 
permitted, when no hazard, nuisance, or insani- 
tary condition is evidenced and written permis- 
sion has been obtained from the Authority 
Having Jurisdiction, remain connected to such 
properly maintained private sewage disposal 
system when there is insufficient grade or fall to 
permit drainage to the sewer by gravity. 

714.0 Damage to Public Sewer or Private Sewage 
Disposal System. 

714.1 It shall be unlawful for any person to deposit, 
by any means whatsoever, into any plumbing 
fixture, floor drain, interceptor, sump, receptor, or 
device which is connected to any drainage system, 
public sewer, private sewer, septic tank, or cesspool, 
any ashes; cinders; solids; rags; flammable, 
poisonous, or explosive liquids or gases; oils; grease; 
and any other thing whatsoever that would or could 
cause damage to the public sewer, private sewer, or 
private sewage disposal system. 

714.2 No rain, surface, or subsurface water shall be 
connected to or discharged into any drainage 
system, unless first approved by the Authority 
Having Jurisdiction. 

714.3 No cesspool, septic tank, seepage pit, or drain 
field shall be connected to any public sewer or to any 
building sewer leading to such public sewer. 

714.4 The Authority Having Jurisdiction shall review 
before approval, the installation of a commercial 
food waste grinder connecting to a private sewage 
disposal system. 

714.5 An approved-type water-tight sewage or 
wastewater holding tank, the contents of which, due 
to their character, must be periodically removed and 
disposed of at some approved off-site location, shall 
be installed only when required by the Authority 
Having Jurisdiction or the Health Officer to prevent 
anticipated surface or subsurface contamination or 
pollution, damage to the public sewer, or other 
hazardous or nuisance conditions. 

715.0 Building Sewer Materials. 

715.1 The building sewer, beginning two (2) feet (610 
mm) from any building or structure, shall be of such 
materials as prescribed in this code. 



715.2 Joining methods and materials shall be as 
prescribed in this code. 

715.3 Replacement of existing building sewer and 
building storm sewers using trenchless methodology 
and materials shall be installed in accordance with 
IAPMO IS-26. 

716.0 Markings. 

Pipe, brick, block, prefabricated septic tanks, prefab- 
ricated septic tank or seepage pit covers, or other 
parts or appurtenances incidental to the installation 
of building sewers or private sewage disposal 
systems shall conform to the approval requirements 
of Chapter 3 of this code. 

717.0 Size of Building Sewers. 

The minimum size of any building sewer shall be 
determined on the basis of the total number of 
fixture units drained by such sewer, in accordance 
with Table 7-8. No building sewer shall be smaller 
than the building drain. 

For alternate methods of sizing building sewers, 
see Appendix L. 

718.0 Grade, Support, and Protection of Building 
Sewers. 

718.1 Building sewers shall be run in practical align- 
ment and at a uniform slope of not less than one- 
fourth (1/4) of an inch per foot (20.8 mm/m) toward 
the point of disposal. 

Exception: When approved by the Authority 
Having Jurisdiction and where it is impractical, 
due to the depth of the street sewer or to the 
structural features or to the arrangement of any 
building or structure, to obtain a slope of one- 
fourth (1/4) of an inch per foot (20.8 mm/m), 
any such pipe or piping four (4) inches (100 mm) 
through six (6) inches (150 mm) shall be 
permitted to have a slope of not less than one- 
eighth (1/8) inch per foot (10.4 mm/m) and any 
such piping eight (8) inches (200 mm) and larger 
shall be permitted to have a slope of not less 
than one-sixteenth (1/16) of an inch per foot (5.2 
mm/m). 

718.2 Building sewer piping shall be laid on a firm 
bed throughout its entire length, and any such 
piping laid in made or filled-in ground shall be laid 
on a bed of approved materials and shall be properly 
supported as required by the Authority Having 
Jurisdiction. 

718.3 No building sewer or other drainage piping or 
part thereof, which is constructed of materials other 



134 



SANITARY DRAINAGE 



718.3-721.2 



than those approved for use under or within a 
building, shall be installed under or within two (2) 
feet (610 mm) of any building or structure, or part 
thereof, nor less than one (1) foot (305 mm) below the 
surface of the ground. The provisions of this subsec- 
tion include structures such as porches and steps, 
whether covered or uncovered; breezeways; roofed 
porte cocheres; roofed patios; carports; covered 
walks; covered driveways; and similar structures or 
appurtenances. 

719.0 Cleanouts. 

719.1 Cleanouts shall be placed inside the building 
near the connection between the building drain and 
the building sewer or installed outside the building 
at the lower end of the building drain and extended 
to grade. 

Additional building sewer cleanouts shall be 
installed at intervals not to exceed one-hundred (100) 
feet (30,480 mm) in straight runs and for each aggre- 
gate horizontal change in direction exceeding one- 
hundred and thirty-five (135) degrees (2.36 rad). 

71 9.2 When a building sewer or a branch thereof does 
not exceed ten (10) feet (3,048 mm) in length and is a 
straight-line projection from a building drain that is 
provided with a cleanout, no cleanout will be required 
at its point of connection to the building drain. 

719.3 Required building sewer cleanouts shall be 
extended to grade and shall comply with the appro- 
priate sections of Cleanouts, Section 707.0, for sizing, 
construction, and materials. When building sewers 
are located under buildings, the cleanout require- 
ments of Section 707.0 shall apply. 

719.4 Each cleanout shall be installed so that it opens 
to allow cleaning in the direction of flow of the soil 
or waste or at right angles thereto and, except in the 
case of wye branch and end-of-line cleanouts, shall 
be installed vertically above the flow line of the pipe. 

719.5 Cleanouts installed under concrete or asphalt 
paving shall be made accessible by yard boxes or by 
extending flush with paving with approved mate- 
rials and shall be adequately protected. 

719.6 Approved manholes shall be permitted to be 
installed in lieu of cleanouts, when first approved by 
the Authority Having Jurisdiction. The maximum 
distance between manholes shall not exceed three- 
hundred (300) feet (91.4 m). 

The inlet and outlet connections shall be made 
by the use of a flexible compression joint not less 
than twelve (12) inches (305 mm) and not exceeding 
three (3) feet (914 mm) from the manhole. No flexible 
compression joints shall be embedded in the 
manhole base. 



720.0 Sewer and Water Pipes. 

Building sewers' or drainage piping of clay or materi- 
als that are not approved for use within a building 
shall not be run or laid in the same trench as the 
water pipes unless both of the following require- 
ments are met: 

(1) The bottom of the water pipe, at points, shall be 
not less than twelve (12) inches (305 mm) above 
the top of the sewer or drain line. 

(2) The water pipe shall be placed on a solid shelf 
excavated at one (1) side of the common trench 
with a clear horizontal distance of not less than 
twelve (12) inches (305 mm) from the sewer or 
drain line. 

Water pipes crossing sewer or drainage 
piping constructed of clay or materials that are 
not approved for use within a building shall be 
laid not less than twelve (12) inches (305 mm) 
above the sewer or drain pipe. 

Note: For the purpose of this section, "within the 
building" shall mean within the fixed limits of 
the building foundation. 

721 .0 Location. 

721.1 Except as provided in Section 721.2, no 
building sewer shall be located in any lot other than 
the lot that is the site of the building or structure 
served by such sewer nor shall any building sewer 
be located at any point having less than the 
minimum distances indicated in Table 7-7 . 

721.2 Nothing contained in this code shall be 
construed to prohibit the use of all or part of an abut- 
ting lot to: 

(1) Provide access to connect a building sewer to an 
available public sewer when proper cause and 
legal easement, not in violation of other require- 
ments, has been first established to the satisfac- 
tion of the Authority Having Jurisdiction. 

(2) Provide additional space for a building sewer 
when proper cause, transfer of ownership, or 
change of boundary, not in violation of other 
requirements, has been first established to the 
satisfaction of the Authority Having Jurisdiction. 
The instrument recording such action shall 
constitute an agreement with the Authority 
Having Jurisdiction and shall clearly state and 
show that the areas so joined or used shall be 
maintained as a unit during the time they are so 
used. Such an agreement shall be recorded in the 
office of the County Recorder as part of the 
conditions of ownership of said properties, and 
shall be binding on heirs, successors, and assigns 
to such properties. A copy of the instrument 
recording such proceedings shall be filed with 
the Authority Having Jurisdiction. 



135 



722.0 -Table 7-8 



UNIFORM PLUMBING CODE 



722.0 Abandoned Sewers and Sewage Disposal 
Facilities. 

722.1 Every abandoned building (house) sewer, or 
part thereof, shall be plugged or capped in an 
approved manner within five (5) feet (1,524 mm) of 
the property line. 

722.2 Every cesspool, septic tank, and seepage pit 
that has been abandoned or has been discontinued 
otherwise from further use, or to which no waste or 
soil pipe from a plumbing fixture is connected, shall 
have the sewage removed therefrom and be 
completely filled with earth, sand, gravel, concrete, 
or other approved material. 

722.3 The top cover or arch over the cesspool, septic 
tank, or seepage pit shall be removed before filling, 
and the filling shall not extend above the top of the 
vertical portions of the sidewalls or above the level 



of any outlet pipe until inspection has been called 
and the cesspool, septic tank, or seepage pit has been 
inspected. After such inspection, the cesspool, septic 
tank, or seepage pit shall be filled to the level of the 
top of the ground. 

722.4 No person owning or controlling any cesspool, 
septic tank, or seepage pit on the premises of such 
person or in that portion of any public street, alley, 
or other public property abutting such premises, 
shall fail, refuse, or neglect to comply with the provi- 
sions of this section or upon receipt of notice so to 
comply from the Authority Having Jurisdiction. 

722.5 Where disposal facilities are abandoned conse- 
quent to connecting any premises with the public 
sewer, the permittee making the connection shall fill 
abandoned facilities as required by the Authority 
Having Jurisdiction within thirty (30) days from the 
time of connecting to the public sewer. 



TABLE 7-7 
Minimum Horizontal Distance Required From Building Sewer 

Buildings or structures 1 2 feet (610 mm) 

Property line adjoining private 

property Clear 

Water supply wells 50 feet (15,240 mm) 

Streams 50 feet (15,240 mm) 

On-site domestic water 

service line 1 foot 4 (305 mm) 

Public water main 10 feet 5 ' 6 (3,048 mm) 



Note: 

Including porches and steps, whether covered or uncovered; breezeways; roofed portecocheres; roofed patios; carports; 
covered walks; covered driveways; and similar structures or appurtenances. 
~ See also Section 313.3. 

3 Drainage piping shall clear domestic water supply wells by not less than fifty (50) feet (15,240 mm). This distance shall be 
permitted to be reduced to not less than twenty-five (25) feet (7,620 mm) when the drainage piping is constructed of materials 
approved for use within a building. 

4 See Section 720.0. 

5 For parallel construction. 

b For crossings, approval by the Health Department or Authority Having Jurisdiction shall be required. 



TABLE 7-8 
Maximum/Minimum Fixture Unit Loading on Building Sewer Piping 



Size of Pipe, 
Inches (mm) 

6 and smaller (150) 

8 (200) 

10 (250) 

12 (300) 



Slope, Inches per Foot (mm/m) 
1/16(5.2) 1/8(10.4) 1/4(20.8) 

(As specified in Table 7-5 /No minimum loading) 
1,950/1,500 2,800/625 3,900/275 

3,400/1,600 4,900/675 6,800/300 

5,600/1,700 8,000/725 11,200/325 



See also Appendix K, Private Sewage Disposal Systems. For alternate methods of sizing drainage piping, see Appendix I. 



136 



SANITARY DRAINAGE 723.0 

723.0 Building Sewer Test. 

Building sewers shall be tested by plugging the end 
of the building sewer at its points of connection with 
the public sewer or private sewage disposal system 
and completely filling the building sewer with water 
from the lowest to the highest point thereof, or by 
approved equivalent low-pressure air test. Plastic 
DWV piping systems shall not be tested by the air 
test method. The building sewer shall be water-tight 
at all points. 



137 



UNIFORM PLUMBING CODE 



138 



CHAPTER 8 

INDIRECT WASTES 



801.0 Indirect Wastes. 

801.1 Airgap or Airbreak Required. Indirect waste 
piping shall discharge into the building drainage 
system through an airgap or airbreak as set forth in 
this code. Where a drainage airgap is required by 
this code, the minimum vertical distance as 
measured from the lowest point of the indirect waste 
pipe or the fixture outlet to the flood-level rim of the 
receptor shall be not less than one (1) inch (25.4 mm). 

801.2 Food and Beverage Handling Establishments. 

Establishments engaged in the storage, preparation, 
selling, serving, processing, or other handling of food 
and beverage involving the following equipment that 
requires drainage shall provide indirect waste piping 
for refrigerators, refrigeration coils, freezers, walk-in 
coolers, iceboxes, ice-making machines, steam tables, 
egg boilers, coffee urns and brewers, hot-and-cold 
drink dispensers, and similar equipment. 

801.2.1 Except for refrigeration coils and ice- 
making machines, the size of the indirect waste 
pipe shall not be smaller than the drain on the 
unit, but shall not be smaller than one (1) inch 
(25 mm), and the maximum developed length 
shall not exceed fifteen (15) feet (4,572 mm). 
Indirect waste pipe for ice-making machines 
shall be not less than the drain on the unit, and 
in no case less than three-quarters (3/4) of an 
inch (20 mm). 

801 .2.2 For walk-in coolers, floor drains shall be 
permitted to be connected to a separate drainage 
line discharging into an outside receptor. The 
flood-level rim of the receptor shall be not less 
than six (6) inches (152 mm) lower than the 
lowest floor drain. Such floor drains shall be 
trapped and individually vented. Cleanouts 
shall be provided at every 90 degree (1.6 rad) 
turn and shall be accessibly located. Such waste 
shall discharge through an airgap or airbreak 
into a trapped and vented receptor, except that a 
full-size airgap is required where the indirect 
waste pipe is under vacuum. 

801.2.3 Food-preparation sinks, steam kettles, 
potato peelers, ice cream dipper wells, and 
similar equipment shall be indirectly connected 
to the drainage system by means of an airgap. 
Bins, sinks, and other equipment having 
drainage connections and used for the storage of 
unpackaged ice used for human ingestion, or 
used in direct contact with ready-to-eat food, 
shall be indirectly connected to the drainage 



system by means of an airgap. Each indirect 
waste pipe from food-handling fixtures or 
equipment shall be separately piped to the 
indirect waste receptor and shall not combine 
with other indirect waste pipes. The piping from 
the equipment to the receptor shall be not less 
than the drain on the unit, and in no case less 
than one-half (1/2) of an inch (15 mm). 

801.3 Bar and Fountain Sink Traps. Where the 
sink in a bar, soda fountain, or counter is so located 
that the trap serving the sink cannot be vented, the 
sink drain shall discharge through an airgap or 
airbreak (see Section 801.2.3) into an approved 
receptor that is vented. The developed length from 
the fixture outlet to the receptor shall not exceed five 
(5) feet (1,524 mm). 

801.4 Connections from Water Distribution 
System. Indirect waste connections shall be 
provided for drains, overflows, or relief pipes from 
potable water pressure tanks, water heaters, boilers, 
and similar equipment that is connected to the 
potable water distribution system. Such indirect 
waste connections shall be made by means of a 
water-distribution airgap constructed in accordance 
with Table 6-3. 

801.5 Sterilizers. Lines, devices, or apparatus such 
as stills, sterilizers, and similar equipment requiring 
waste connections and used for sterile materials shall 
be indirectly connected by means of an airgap. Each 
such indirect waste pipe shall be separately piped to 
the receptor and shall not exceed fifteen (15) feet 
(4,572 mm). Such receptors shall be located in the 
same room. 

801.6 Drip or Drainage Outlets. Appliances, devices, 
or apparatus not regularly classified as plumbing 
fixtures, but which have drip or drainage outlets, 
shall be permitted to be drained by indirect waste 
pipes discharging into an open receptor through 
either an airgap or airbreak (see Section 801.2.1). 

802.0 Approvals. 

No plumbing fixtures served by indirect waste pipes 
or receiving discharge therefrom shall be installed 
until first approved by the Authority Having Juris- 
diction. 

803.0 Indirect Waste Piping. 

Except as hereinafter provided, the size and 
construction of indirect waste piping shall be in 



139 



803.0 - 808.0 



UNIFORM PLUMBING CODE 



accordance with other sections of this code appli- 
cable to drainage and vent piping. No vent from 
indirect waste piping shall combine with any sewer- 
connected vent but shall extend separately to the 
outside air. Indirect waste pipes exceeding five (5) 
feet (1,524 mm), but less than fifteen (15) feet (4,572 
mm) in length shall be directly trapped, but such 
traps need not be vented. 

Indirect waste pipes less than fifteen (15) feet 
(4,572 mm) in length shall be not less than the diam- 
eter of the drain outlet or tailpiece of the fixture, 
appliance, or equipment served, and in no case less 
than one-half (1/2) of an inch (15 mm). Angles and 
changes of direction in such indirect waste pipes 
shall be provided with cleanouts so as to permit 
flushing and cleaning. 

804.0 Indirect Waste Receptors. 

804.1 Plumbing fixtures or other receptors receiving 
the discharge of indirect waste pipes shall be 
approved for the use proposed and shall be of such 
shape and capacity as to prevent splashing or flooding 
and shall be located where they are readily accessible 
for inspection and cleaning. No standpipe receptor for 
any clothes washer shall extend more than thirty (30) 
inches (762 mm), or not less than eighteen (18) inches 
(457 mm) above its trap. No trap for any clothes 
washer standpipe receptor shall be installed below the 
floor, but shall be roughed in not less than six (6) 
inches (152 mm) and not more than eighteen (18) 
inches (457 mm) above the floor. No indirect waste 
receptor shall be installed in any toilet room, closet, 
cupboard, or storeroom, nor in any other portion of a 
building not in general use by the occupants thereof; 
except standpipes for clothes washers shall be 
permitted to be installed in toilet and bathroom areas 
when the clothes washer is installed in the same room. 

804.2 Where water service connections are installed 
for a clothes washer, an approved method of waste 
disposal shall be provided. 



806.0 Sterile Equipment. 

Appliances, devices, or apparatus such as stills, ster- 
ilizers, and similar equipment requiring water and 
waste and used for sterile materials shall be drained 
through an air gap. 

807.0 Appliances. 

807.1 Appliances, devices, equipment, or other 
apparatus not regularly classed as plumbing fixtures, 
which are equipped with pumps, drips, or drainage 
outlets, shall be permitted to be drained by indirect 
waste pipes discharging into an approved type of 
open receptor. 

807.2 When the condensate waste from air- condi- 
tioning coils discharges by direct connection to a 
lavatory tailpiece or to an approved accessible inlet 
on a bathtub overflow, the connection shall be 
located in the area controlled by the same person 
controlling the air-conditioned space. 

807.3 When undiluted condensate waste from a fuel- 
burning condensing appliance is discharged into the 
drainage system, the material in the drainage system 
shall be cast-iron, galvanized iron, plastic, or other 
materials approved for this use, 

Exceptions: 

(1) When the above condensate is discharged to 
an exposed fixture tailpiece and trap, such tail- 
piece and trap shall be permitted to be brass. 

(2) Any materials approved in Section 701.0 
shall be permitted to be used when data is 
provided that the condensate waste is 
adequately diluted. 

807.4 No domestic dishwashing machine shall be 
directly connected to a drainage system or food waste 
disposer without the use of an approved dishwasher 
airgap fitting on the discharge side of the dishwashing 
machine. Listed airgaps shall be installed with the 
flood-level (FL) marking at or above the flood level of 
the sink or drainboard, whichever is higher. 



805.0 Pressure Drainage Connections. 

Indirect waste connections shall be provided for 
drains, overflows, or relief vents from the water 
supply system, and no piping or equipment carrying 
wastes or producing wastes or other discharges 
under pressure shall be directly connected to any 
part of the drainage system. 

The foregoing shall not apply to any approved 
sump pump or to any approved pressure-wasting 
plumbing fixture or device when the Authority 
Having Jurisdiction has been satisfied that the 
drainage system is adequately sized to accommodate 
the anticipated discharge thereof. 



808.0 Cooling Water. 

When permitted by the Authority Having Jurisdic- 
tion, clean running water used exclusively as a 
cooling medium in an appliance, device, or apparatus 
shall be permitted to discharge into the drainage 
system through the inlet side of a fixture trap in the 
event that a suitable fixture is not available to receive 
such discharge. Such trap connection shall be by 
means of a pipe connected to the inlet side of an 
approved fixture trap, the upper end terminating in a 
funnel-shaped receptacle set adjacent, and not less 
than six (6) inches (152 mm) above the overflow rim 
of the fixture. 



140 



INDIRECT WASTES 



809.0-811.4 



809.0 Drinking Fountains. 

Drinking fountains shall be permitted to be installed 
with indirect wastes. 

810.0 Steam and Hot Water Drainage Condensers 
and Sumps. 

810.1 No steam pipe shall be directly connected to 
any part of a plumbing or drainage system, nor shall 
any water having a temperature above 140°F (60°C) 
be discharged under pressure directly into any part 
of a drainage system. Pipes from boilers shall 
discharge by means of indirect waste piping, as 
determined by the Authority Having Jurisdiction or 
the boiler manufacturer's recommendations. Such 
pipes shall be permitted to be indirectly connected 
by discharging into an open or closed condenser or 
an intercepting sump of an approved type that will 
prevent the entrance of steam or such water under 
pressure into the drainage system. Closed 
condensers or sumps shall be provided with a vent 
that shall be taken off the top and extended sepa- 
rately, full size above the roof. Condensers and 
sumps shall be properly trapped at the outlet with a 
deep seal trap extending to within six (6) inches (152 
mm) of the bottom of the tank. The top of the deep 
seal trap shall have a three-fourths (3/4) inch (19.1 
mm) opening located at the highest point of the trap 
to serve as a siphon breaker. Outlets shall be taken 
off from the side in such a manner as to allow a 
waterline to be maintained that will permanently 
occupy not less than one-half (1/2) the capacity of 
the condenser or sump. Inlets shall enter above the 
waterline. Wearing plates or baffles shall be installed 
in the tank to protect the shell. The sizes of the 
blowoff line inlet, the water outlets, and the vent 
shall be as shown in Table 8-1. The contents of 
condensers receiving steam or hot water under pres- 
sure must pass through an open sump before 
entering the drainage system. 

810.2 Sumps, condensers, or intercepting tanks that 
are constructed of concrete shall have walls and 
bottom not less than four (4) inches (102 mm) in 
thickness, and the inside shall be cement plastered 
not less than one-half (1/2) inch (12.7 mm) in thick- 
ness. Condensers constructed of metal shall be not 
less than No. 12 U.S. standard gauge (0.109 inch) 
(2.77 mm), and such metal condensers shall be 
protected from external corrosion by an approved 
bituminous coating. 

810.3 Sumps and condensers shall be provided with 
suitable means of access for cleaning and shall 
contain a volume of not less than twice the volume of 
water removed from the boiler or boilers connected 
thereto when the normal water level of such boiler or 
boilers is reduced not less than four (4) inches (102 mm). 



TABLE 8-1 

Pipe Connections in Btowoff 

Condensers and Sumps 



Boiler Btowoff 



Water Outlet 



Vent 



3/4 in.* (20 mm) 3/4 in.* (20 mm) 2 in. (50 mm) 

1 in. (25 mm) 1 in. (25 mm) 2-1/2 in. (65 mm) 
1-1/4 in. (32 mm) 1-1/4 in. (32 mm) 3 in. (80 mm) 
1-1/2 in. (40 mm) 1-1/2 in. (40 mm) 4 in. (100 mm) 

2 in. (50 mm) 2 in. (50 mm) 5 in. (125 mm) 
2-1/2 in. (65 mm) 2-1/2 in. (65 mm) 6 in. (150 mm) 

* To be used only with boilers of one-hundred (100) square 
feet (9.29 m~) of heating surface or less. 

810.4 Strainers. Every indirect waste interceptor 
receiving discharge-containing particles that would 
clog the receptor drain shall have a readily remov- 
able beehive strainer. 



811.0 Chemical Wastes. 

811.1 Chemical or industrial liquid wastes that are 
likely to damage or increase maintenance costs on the 
sanitary sewer system, detrimentally affect sewage 
treatment or contaminate surface or subsurface waters 
shall be pretreated to render them innocuous prior to 
discharge into a drainage system. Detailed plans and 
specifications of the pretreatment facilities shall be 
required by the Authority Having Jurisdiction. 

Piping conveying industrial, chemical, or 
process wastes from their point of origin to sewer- 
connected pretreatment facilities shall be of such 
material and design as to adequately perform its 
intended function to the satisfaction of the Authority 
Having Jurisdiction. Drainage discharge piping from 
pretreatment facilities or interceptors shall conform 
to standard drainage installation procedures. 

Copper tube shall not be used for chemical or 
industrial wastes as defined in this section. 

811.2 Each waste pipe receiving or intended to 
receive the discharge of any fixture into which acid or 
corrosive chemical is placed, and each vent pipe 
connected thereto, shall be constructed of Chlorinated 
Poly(vinyl-chloride) (CPVC), Polypropylene (PP), I 
Polyvinylidene Fluoride (PVDF), chemical-resistant 
glass, high-silicon iron pipe, or lead pipe with a wall 
thickness of not less than one-eighth (1/8) inch (3.2 
mm); an approved type of ceramic glazed or unglazed 
vitrified clay; or other approved corrosion-resistant 
materials. 

811.3 Joining materials shall be of approved type 
and quality. 

81 1 .4 Wherever practicable, piping shall be readily 
accessible and installed with the maximum of clear- 
ance from other services. 



141 



811.5-814.3 



UNIFORM PLUMBING CODE 



811.5 The owner shall make and keep a permanent 
record of the location of piping and venting carrying 
chemical waste. 

81 1 .6 No chemical vent shall intersect vents for other 
services. 

811.7 Chemical wastes shall be discharged in a 
manner approved by the Authority Having Jurisdic- 
tion. 

81 1 .8 The provisions in this section relative to mate- 
rials and methods of construction shall not apply to 
installations such as photographic or X-ray dark 
rooms or research or control laboratories where 
minor amounts of adequately diluted chemicals are 
discharged. 

81 2.0 Clear Water Wastes. 

Water lifts, expansion tanks, cooling jackets, sprin- 
kler systems, drip or overflow pans, or similar 
devices that discharge clear wastewater into the 
building drainage system shall discharge through an 
indirect waste. 



TABLE 8-2 
Minimum Condensate Pipe Size 



Equipment Capacity 


Minimum 


i Condensate 


in 


Tons of 


Pipe 


Diameter 


Refrigeration (kW) 


in Inches (mm) 


Up to 20 


(Up to 70.34) 


3/4 


(20) 


21-40 


(73.85-140.67) 


1 


(25) 


41-90 


(144.19-316.5) 


1-1/4 


(32) 


91-125 


(320.03^39.6) 


1-1/2 


(40) 


126-250 


(443.12-879.2) 


2 


(50) 



The size of condensate waste pipes is for one (1) 
unit or a combination of units, or as recommended 
by the manufacturer. The capacity of waste pipes 
assumes a one-eighth (1/8) inch per foot (10.4 
mm/m) or 1 percent slope, with the following pipe 
conditions: 



Outside Air -20? 
DB WB 

90°F 73°F 
(32°C) (23°C) 



Room Air - 80% 
DB WB 

75°F 62.5°F 
(24°C) (17°) 



813.0 Swimming Pools. 

Pipes carrying wastewater from swimming or 
wading pools, including pool drainage and back- 
wash from filters, shall be installed as an indirect 
waste. Where a pump is used to discharge waste 
pool water to the drainage system, the pump 
discharge shall be installed as an indirect waste. 

814.0 Condensate Wastes and Control. 

814.1 Condensate Disposal. Condensate from air 
washers, air-cooling coils, fuel-burning condensing 
appliances, the overflow from evaporative coolers, 
and similar water-supplied equipment or similar air- 
conditioning equipment shall be collected and 
discharged to an approved plumbing fixture or 
disposal area. If discharged into the drainage system, 
equipment shall drain by means of an indirect waste 
pipe. The waste pipe shall have a slope of not less 
than one-eighth (1/8) inch per foot (10.4 mm/m) or 1 
percent slope and shall be of approved 
corrosion-resistant material not smaller than the 
outlet size as required in Table 8-2 for air-cooling 
coils or condensing fuel-burning appliances, respec- 
tively. Condensate or wastewater shall not drain 
over a public way. 

81 4.2 Size. Air-conditioning condensate waste pipes 
shall be independent of any drainage and waste 
system and shall be not less than the minimum size 
shown in Table 8-2. 



Condensate drain sizing for other slopes or other 
conditions shall be approved by the Authority 
Having Jurisdiction. 

Air-conditioning waste pipes shall be 
constructed of materials specified in Chapter 7. 

814.3 Point of Discharge. Air-conditioning conden- 
sate waste pipes shall connect indirectly to the 
drainage system through an airgap or airbreak to a 
properly trapped and vented receptors dry wells, 
leach pits, or the tailpiece of plumbing fixtures. 

Condensate waste shall not drain over a public 
way. 



142 



CHAPTER 9 

VENTS 



| 901.0 General. 

901.1 Vents Required. 

Each plumbing fixture trap, except as otherwise 
provided in this code, shall be protected against 
siphonage and back-pressure, and air circulation 
shall be ensured throughout all parts of the drainage 
system by means of vent pipes installed in accor- 
dance with the requirements of this chapter and as 
otherwise required by this code. 

901 .2 Trap Seal Protection. The vent system shall be 
designed to prevent a trap seal from being exposed 
to a pressure differential that exceeds one (1) inch of 
a water column (249 Pa) on the outlet side of the trap. 

902.0 Vents Not Required. 

902.1 Vent piping shall be permitted to be omitted 
on an interceptor when such interceptor acts as a 
primary settling tank and discharges through a 
horizontal indirect waste pipe into a secondary 
interceptor. The second interceptor shall be prop- 
erly trapped and vented. 

902.2 Traps serving sinks that are part of the equip- 
ment of bars, soda fountains, and counters need not 
be vented when the location and construction of 
such bars, soda fountains, and counters is such as to 
make it impossible to do so. When such conditions 
exist, said sinks shall discharge by means of 
approved indirect waste pipes into a floor sink or 
other approved type of receptor. 

903.0 Materials. 

1903.1 Vent pipe and fittings shall be in accordance 
with the applicable standards referenced in Table 7-1, 
except that: 

| 903.1 .1 No galvanized steel or 304 stainless steel 

pipe shall be installed underground and shall be 
not less than six (6) inches (152 mm) above 
ground. 

1903.1.2 ABS and PVC DWV piping installations 
shall be in accordance with the applicable stan- 
dards referenced in Table 14-1, and Chapter 15 
"Firestop Protection/' Except for individual 
single-family dwelling units, materials exposed 
within ducts or plenums shall have a flame- 
spread index of a maximum of twenty-five (25) 
and a smoke-developed index of not more than 
fifty (50) when tested in accordance with the Test 
for Surface-Burning Characteristics of the Building 
Materials (see the Building Code standards based 
on ASTM E84 and UL 723). 



903.2 Use of Copper Tubing. 

903.2.1 Copper tube for underground drainage 
and vent piping shall have a weight of not less 
than that of copper drainage tube type DWV. 

903.2.2 Copper tube for above ground drainage 
and vent piping shall have a weight of not less 
than that of copper drainage tube type DWV. 

903.2.3 Copper tube shall not be used for chem- 
ical or industrial wastes as defined in Section 
811.0. 

903.2.4 Hard-drawn copper tubing, in addition 
to the required incised marking, shall be marked 
in accordance with either ASTM B306, Copper 
Drainage Tube (DWV), or ASTM B88 Seamless 
Copper Water Tube as listed in Table 14-1. The 
colors shall be: Type K, green; Type L, blue; 
Type M, red; Type DWV, yellow. 

903.3 Changes in direction of vent piping shall be 
made by the appropriate use of approved fittings, 
and no such pipe shall be strained or bent. Burred 
ends shall be reamed to the full bore of the pipe. 

904.0 Size of Vents. 

904.1 The size of vent piping shall be determined 
from its length and the total number of fixture units 
connected thereto, as set forth in Table 7-5. The 
diameter of an individual vent shall be not less than 
one and one-fourth (1-1/4) inches (32 mm) nor less 
than one-half (1/2) the diameter of the drain to 
which it is connected. In addition, the drainage 
piping of each building and each connection to a 
public sewer or a private sewage disposal system 
shall be vented by means of one (1) or more vent 
pipes, the aggregate cross-sectional area of which 
shall be not less than that of the largest required 
building sewer, as determined from Table 7-5. Vent 
pipes from fixtures located upstream from pumps, 
ejectors, backwater valves, or other devices that in 
any way obstruct the free flow of air and other gases 
between the building sewer and the outside atmo- 
sphere shall not be used for meeting the cross- 
sectional area venting requirements of this section. 

Exception: When connected to a common 
building sewer, the drainage piping of two (2) or 
more buildings located on the same lot and under 
one (1) ownership shall be permitted to be vented 
by means of piping sized in accordance with Table 
7-5, provided the aggregate cross-sectional area of 
vents is not less than that of the largest required 
common building sewer. 



143 



904.2-907.2 



UNIFORM PLUMBING CODE 



904.2 No more than one-third (1/3) of the total 
permitted length, per Table 7-5, of any minimum- 
sized vent shall be installed in a horizontal position. 

Exception: When a minimum-sized vent is 
increased one (1) pipe size for its entire length, 
the maximum length limitation does not apply. 

905.0 Vent Pipe Grades and Connections. 

905.1 Vent and branch vent pipes shall be free from 
drops or sags, and each such vent shall be level or 
shall be so graded and connected as to drip back by 
gravity to the drainage pipe it serves. 

905.2 Where vents connect to a horizontal drainage 
pipe, each vent pipe shall have its invert taken off 
above the drainage centerline of such pipe down- 
stream of the trap being served. 

905.3 Unless prohibited by structural conditions, 
each vent shall rise vertically to a point not less than 
six (6) inches (152 mm) above the flood-level rim of 
the fixture served before offsetting horizontally, and 
whenever two (2) or more vent pipes converge, each 
such vent pipe shall rise to a point not less than six 
(6) inches (152 mm) in height above the flood-level 
rim of the plumbing fixture it serves before being 
connected to any other vent. Vents less than six (6) 
inches (152 mm) above the flood-level rim of the 
fixture shall be installed with approved drainage 
fittings, material, and grade to the drain. 

905.4 Vent pipes shall extend undiminished in size 
above the roof, or shall be reconnected with a soil or 
waste vent of proper size. 

905.5 The vent pipe opening from a soil or waste 
pipe, except for water closets and similar fixtures, 
shall not be below the weir of the trap. 

905.6 Two (2) fixtures shall be permitted to be served 
by a common vertical pipe when each such fixture 
wastes separately into an approved double fitting 
having inlet openings at the same level. 

906.0 Vent Termination. 

906.1 Each vent pipe or stack shall extend through 
its flashing and shall terminate vertically not less 
than six (6) inches (152 mm) above the roof nor less 
than one (1) foot (305 mm) from any vertical surface. 

906.2 Each vent shall terminate not less than ten (10) 
feet (3,048 mm) from, or not less than three (3) feet 
(914 mm) above, any openable window, door, 
opening, air intake, or vent shaft, or not less than 
three (3) feet (914 mm) in every direction from any 
lot line, alley and street excepted. 

906.3 Vent pipes shall be extended separately or 
combined, of full required size, not less than six (6) 
inches (152 mm) above the roof or fire wall. Flag- 



poling of vents shall be prohibited except where the 
roof is used for purposes other than weather protec- 
tion. Vents within ten (10) feet (3,048 mm) of any 
part of the roof that is used for such other purposes 
shall extend not less than seven (7) feet (2,134 mm) 
above such roof and shall be securely stayed. 

906.4 Vent pipes for outdoor installations shall 
extend not less than ten (10) feet (3,048 mm) above 
the surrounding ground and shall be securely 
supported. 

906.5 Joints at the roof around vent pipes shall be 
made water-tight by the use of approved flashings or 
flashing material. 

906.6 Lead. See Table 14-1. Sheet lead shall be not 
less than the following: 

For safe pans - not less than four (4) pounds per 
square foot (19.5 kg/m 2 ) or one-sixteenth (1/16) inch 
(1.6 mm) thick. 

For flashings or vent terminals - not less than 
three (3) pounds per square foot (14.6 kg/m 2 ). 

Lead bends and lead traps shall be not less than 
one-eighth (1/8) inch (3.2 mm) wall thickness. 

906.7 Frost or Snow Closure. Where frost or snow 
closure is likely to occur in locations having minimum 
design temperature below 0°F (-17.8°C), vent termi- 
nals shall be not less than two (2) inches (50 mm) in 
diameter, but in no event smaller than the required 
vent pipe. The change in diameter shall be made 
inside the building not less than one (1) foot (305 mm) 
below the roof in an insulated space and terminate not 
less than ten (10) inches (254 mm) above the roof, or 
as required by the Authority Having Jurisdiction. 

907.0 Vent Stacks and Relief Vents. 

907.1 Each drainage stack that extends ten (10) or 
more stories above the building drain or other hori- 
zontal drain, shall be served by a parallel vent stack, 
which shall extend undiminished in size from its 
upper terminal and connect to the drainage stack at or 
immediately below the lowest fixture drain. Each such 
vent stack shall also be connected to the drainage 
stack at each fifth floor, counting down from the 
uppermost fixture drain, by means of a yoke vent, the 
size of which shall be not less in diameter than either 
the drainage or the vent stack, whichever is smaller. 

907.2 The yoke vent connection to the vent stack 
shall be placed not less than forty-two (42) inches 
(1,067 mm) above the floor level, and the yoke vent 
connection to the drainage stack shall be by means of 
a wye-branch fitting placed below the lowest 
drainage branch connection serving that floor. 



144 



VENTS 



908.0-910.2 



I 908.0 Wet Venting. 

I 908.1 Vertical Wet Venting. 

i 908.1.1 Where Permitted. Wet venting is limited 
to vertical drainage piping receiving the 
discharge from the trap arm of one (1) and two (2) 
fixture unit fixtures that also serves as a vent not 
exceeding four (4) fixtures. Wet-vented fixtures 
shall be within the same story; provided, further, 
that fixtures with a continuous vent discharging 
into a wet vent shall be within the same story as 
the wet- vented fixtures. No wet vent shall exceed 
six (6) feet (1,829 mm) in developed length. 

| 908.1.2 Size. The vertical piping between any 

two (2) consecutive inlet levels shall be consid- 
ered a wet-vented section. Each wet-vented 
section shall be not less than one (1) pipe size 
exceeding the required minimum waste pipe size 
of the upper fixture or shall be one (1) pipe size 
exceeding the required minimum pipe size for 
the sum of the fixture units served by such wet- 
vented section, whichever is larger, but in no 
case less than two (2) inches (51 mm). 

I 908.1.3 Vent Connection. Common vent sizing 
shall be the sum of the fixture units served but, 
in no case, smaller than the minimum vent pipe 
size required for any fixture served, or by 
Section 904.0. 

I 908.2 Horizontal Wet Venting for Bathroom 
Groups. 

I 908.2.1 Where Permitted. Water closets, bath- 
tubs, showers and floor drains within one (1 ) or 

| two (2) bathroom groups located on the same 

floor level and for private use shall be permitted 
to be vented by a wet vent. The wet vent shall be 
considered the vent for the fixtures and shall 
extend from the connection of the dry vent along 
the direction of the flow in the drain pipe to the 
most downstream fixture drain or trap arm 
connection to the horizontal branch drain. Each 
wet-vented fixture drain or trap arm shall 
connect independently to the wet-vented hori- 
zontal branch drain. Each individual fixture 
drain or trap arm shall connect horizontally to 
the wet-vented horizontal branch drain or shall 
be provided with a dry vent. The trap to vent 
distance shall be in accordance with Table 10-1. 
Only the fixtures within the bathroom groups 
shall connect to the wet-vented horizontal 
branch drain. The water closet fixture drain or 
trap arm connection to the wet vent shall be 
downstream of any fixture drain or trap arm 
connections. Any additional fixtures shall 
discharge downstream of the wet vent system 
and be conventionally vented. 



908.2.2 Vent Connection. The dry vent connec- 
tion to the wet vent shall be an individual vent or 
common vent for the lavatory, urinal, bidet, 
shower, or bathtub. Only one (1) wet-vented 
fixture drain or trap arm shall discharge 
upstream of the dry-vented fixture drain connec- 
tion. 

908.2.3 Size. The wet vent shall be sized based on 
the fixture unit discharge into the wet vent. The 
wet vent shall be not less than two (2) inches (50 
mm) in diameter for four (4) dfu or less, and not 
less than three (3) inches (80 mm) in diameter for 
five (5) dfu or more. The dry vent shall be sized in 
accordance with Tables 7-3 and 7-5 based on the 
total fixtures units discharging into the wet vent. 

909.0 Special Venting for island Fixtures. 

Traps for island sinks and similar equipment shall be 
roughed in above the floor and shall be permitted to 
be vented by extending the vent as high as possible, 
but not less than the drainboard height and then 
returning it downward and connecting it to the hori- 
zontal sink drain immediately downstream from the 
vertical fixture drain. The return vent shall be 
connected to the horizontal drain through a wye- 
branch fitting and shall, in addition, be provided with 
a foot vent taken off the vertical fixture vent by means 
of a wye branch immediately below the floor and 
extending to the nearest partition and then through 
the roof to the open air, or shall be permitted to be 
connected to other vents at a point not less than six (6) 
inches (152 mm) above the flood-level rim of the 
fixtures served. Drainage fittings shall be used on all 
parts of the vent below the floor level, and a slope of 
not less than one-fourth (1/4) inch per foot (20.8 
mm/m) back to the drain shall be maintained. The 
return bend used under the drainboard shall be a one 
(1) piece fitting or an assembly of a 45 degree (0.79 
rad), a 90 degree (1.6 rad), and a 45 degree (0.79 rad) 
elbow in the order named. Pipe sizing shall be as else- 
where required in this code. The island sink drain, 
upstream of the returned vent, shall serve no other 
fixtures. An accessible cleanout shall be installed in 
the vertical portion of the foot vent. 

910.0 Combination Waste and Vent Systems. 

910.1 Combination waste and vent systems shall be 
permitted only where structural conditions preclude 
the installation of conventional systems as otherwise 
prescribed by this code. 

910.2 Plans and specifications for each combination 
waste and vent system shall first be approved by the 



145 



910.2-911.2 



UNIFORM PLUMBING CODE 



Authority Having Jurisdiction before any portion of 
any such system is installed. 

910.3 Each combination waste and vent system, as 
defined in Chapter 2, shall be provided with a vent 
or vents adequate to ensure free circulation of air. 
Any branch exceeding fifteen (15) feet (4,572 mm) in 
length shall be separately vented in an approved 
manner. The area of any vent installed in a combina- 
tion waste and vent system shall be not less than 
one-half (1/2) the inside cross-sectional area of the 
drain pipe served. The vent connection shall be 
downstream of the uppermost fixture. 

910.4 Each waste pipe and each trap in any such 
system shall be not less than two (2) pipe sizes 
exceeding the sizes required by Chapter 7 of this 
code, and not less than two (2) pipe sizes exceeding 
any fixture tailpiece or connection. 

910.5 No vertical waste pipe shall be used in any 
such system, except the tailpiece or connection 
between the outlet of a plumbing fixture and the 
trap. Such tailpieces or connections shall be as short 
as possible, and in no case shall exceed two (2) feet 
(610 mm). 

Exception: Branch lines shall be permitted to 
have 45 degree (0.79 rad) vertical offsets. 

910.6 An accessible cleanout shall be installed in 
each vent for the combination waste and vent 
system. Cleanouts shall not be required on any wet- 
vented branch serving a single trap when the fixture 
tailpiece or connection is not less than two (2) inches 
(50 mm) in diameter and provides ready access for 
cleaning through the trap. 

910.7 No water closet or urinal shall be installed on 
any such system. Other one (1), two (2), or three (3) 
unit fixtures remotely located from the sanitary 
system and adjacent to a combination waste and 
vent system shall be permitted to be connected to 
such system in the conventional manner by means of 
waste and vent pipes of regular sizes, providing that 
the two (2) pipe size increase required in Section 
910.4 is based on the total fixture unit load connected 
to the system. 

Note: See Appendix B of this code for explanatory 
notes on the design of combination waste and vent 
systems. 



911.2 Minimum Requirements. An engineered vent 
system shall provide protection of the trap seal in 
accordance with Section 901.2. 



911.0 Engineered Vent System. 

911.1 General. The design and sizing of a vent 
system shall be permitted to be determined by 
accepted engineering practice. The system shall be 
designed by a registered design professional and 
approved in accordance with Section 301.4. 



146 



CHAPTER 10 

TRAPS AND INTERCEPTORS 



1001.0 Traps Required. 

1001.1 Each plumbing fixture, excepting those hav- 
ing integral traps or as permitted in Section 100L2, 
shall be separately trapped by an approved type of 
water seal trap. Not more than one (1) trap shall be 
permitted on a trap arm. 

1001.2 One (1) trap shall be permitted to serve a set 
of not more than three (3) single compartment sinks 
or laundry tubs of the same depth or three (3) lavato- 
ries immediately adjacent to each other and in the 
same room if the waste outlets are not more than 
thirty (30) inches (762 mm) apart and the trap is cen- 
trally located when three (3) compartments are 
installed. 

1 001 .3 No food waste disposal unit shall be installed 
with any set of restaurant, commercial, or industrial 
sinks served by a single trap; each such food waste 
disposal unit shall be connected to a separate trap. 
Each domestic clothes washer and each laundry tub 
shall be connected to a separate and independent 
trap, except that a trap serving a laundry tub shall be 
permitted to also receive the waste from a clothes 
washer set adjacent thereto. No clothes washer or 
laundry tub shall be connected to any trap for a 
kitchen sink. 

1001.4 The vertical distance between a fixture outlet 
and the trap weir shall be as short as practicable, but 
in no case shall the tailpiece from any fixture exceed 
twenty-four (24) inches (610 mm) in length. 

1002.0 Traps Protected by Vent Pipes. 

1002.1 Each plumbing fixture trap, except as other- 
wise provided in this code, shall be protected against 
siphonage, back-pressure, and air circulation shall be 



assured throughout all parts of the drainage system 
by means of a vent pipe installed in accordance with 
the requirements of this code. 

1 002.2 Each fixture trap shall have a protecting vent 
so located that the developed length of the trap arm 
from the trap weir to the inner edge of the vent shall 
be within the distance given in Table 10-1, but in no 
case less than two (2) times the diameter of the trap 
arm. 

1002.3 A trap arm shall be permitted to change 
direction without the use of a cleanout when such 
change of direction does not exceed 90 degrees (1.6 
rad). All horizontal changes in direction of trap arms 
shall comply with Section 706.3. 

Exception: For trap arms three (3) inches (80 
mm) in diameter and larger, the change of direc- 
tion shall not exceed 135 degrees (2.36 rad) with- 
out the use of a cleanout. 

1002.4 The vent pipe opening from a soil or waste 
pipe, except for water closets and similar fixtures, 
shall not be below the weir of the trap. 

1003.0 Traps — Described. 

1003.1 Each trap, except for traps within an intercep- 
tor or similar device shall be self-cleaning. Traps for 
bathtubs, showers, lavatories, sinks, laundry tubs, 
floor drains, urinals, drinking fountains, dental 
units, and similar fixtures shall be of standard 
design, weight and shall be of ABS, cast brass, cast 
iron, lead, PP, PVC, or other approved material. An 
exposed and readily accessible drawn-brass tubing 
trap, not less than 17 B & S Gauge (0.045 inch) (1.1 



TABLE 10-1 

Horizontal Lengths of Trap Arms 

(Except for water closets and similar fixtures)* 





Distance 






Distance 




Trap Arm 


Trap to Vent 


Length 


Trap Arm 


Trap to Vent 


Length 


Pipe Diameter 


Minimum 


Maximum 


Pipe Diameter 


Minimum 


Maximum 


1-1/4" 


2-1/2" 


30" (2'-6") 


32 mm 


64 mm 


762 mm 


1-1/2" 


3" 


42" (3'-6") 


40 mm 


76 mm 


1,067 mm 


2" 


4" 


60" (5'-0") 


50 mm 


102 mm 


1,524 mm 


3" 


6" 


72" (6'-0") 


80 mm 


152 mm 


1,829 mm 


4" 


8" 


120" (10'-0") 


100 mm 


203 mm 


3,048 mm 


Exceeding 4" 


2 x Diameter 


120" (10'-0") 


Exceeding 100 mm 


2x Diameter 


3,048 mm 



Maintain one- fourth (1/4) inch per foot slope (20.8 mm/m) 

* The developed length between the trap of a water closet or similar fixture (measured from the top of the closet flange to the 
inner edge of the vent) and it's vent shall not exceed six (6) feet (1,829 mm) 



147 



1003.1 -1009.6 



UNIFORM PLUMBING CODE 



mm), shall be permitted to be used on fixtures dis- 
charging domestic sewage. 

Exception: Drawn-brass tubing traps shall not 
be used for urinals. Each trap shall have the 
manufacturer's name stamped legibly in the 
metal of the trap, and each tubing trap shall 
have the gauge of the tubing in addition to the 
manufacturer's name. Every trap shall have a 
smooth and uniform interior waterway. 

1003.2 A maximum of one (1) approved slip joint fit- 
ting shall be permitted to be used on the outlet side 
of a trap, and no tubing trap shall be installed with- 
out a listed tubing trap adapter. Listed plastic trap 
adapters shall be permitted to be used to connect list- 
ed metal tubing traps. 

1003.3 The size (nominal diameter) of a trap for a 
given fixture shall be sufficient to drain the fixture 
rapidly, but in no case less than nor more than one 
(1) pipe size larger than given in Table 7-3. The trap 
shall be the same size as the trap arm to which it is 
connected. 

1004.0 Traps — Prohibited. 

No form of trap that depends for its seal upon the 
action of movable parts shall be used. No trap that 
has concealed interior partitions, except those of 
plastic, glass, or similar corrosion-resisting material, 
shall be used. "S" traps, bell traps, and crown-vented 
traps shall be prohibited. No fixture shall be double 
trapped. Drum and bottle traps shall be installed 
only for special conditions. No trap shall be installed 
without a vent, except as otherwise provided in this 
code. 

11004.1 Bladders, check valves or any other type of 
devices with moveable parts shall be prohibited to 
serve as a trap. 

1005.0 Trap Seals. 

| Each fixture trap shall have a liquid seal of not less 
than two (2) inches (51 mm) and not more than four 
(4) inches (102 mm), except where a deeper seal is 
found necessary by the Authority Having 
Jurisdiction. Traps shall be set true with respect to 

| their liquid seals and, where necessary, they shall be 
protected from freezing. 

1006.0 Floor Drain Traps. 

Floor drains shall connect into a trap so constructed 
that it can be readily cleaned and of a size to serve 
efficiently the purpose for which it is intended. The 
drain inlet shall be so located that it is at all times in 
full view. When subject to reverse flow of sewage or 
liquid waste, such drains shall be equipped with an 
approved backwater valve. 



1007.0 Trap Seal Protection. 

Floor drain or similar traps directly connected to the 
drainage system and subject to infrequent use shall 
be protected with a trap seal primer, except where 
not deemed necessary for safety or sanitation by the 
Authority Having Jurisdiction. Trap seal primers 
shall be accessible for maintenance. 

1008.0 Building Traps. 

Building traps shall not be installed except where 
required by the Authority Having Jurisdiction. Each 
building trap when installed shall be provided with 
a cleanout and with a relieving vent or fresh-air 
intake on the inlet side of the trap, which need not be 
larger than one-half the diameter of the drain to 
which it connects. Such relieving vent or fresh-air 
intake shall be carried above grade and terminate in 
a screened outlet located outside the building. 

1009.0 Industrial Interceptors (Clarifiers) and 
Separators. 

1009.1 When Required. Interceptors (clarifiers) 
(including grease, oil, sand interceptors [clarifiers], 
etc.) shall be required by the Authority Having 
Jurisdiction when they are necessary for the proper 
handling of liquid wastes containing grease, 
flammable wastes, sand, solids, acid or alkaline sub- 
stances, or other ingredients harmful to the building 
drainage system, the public or private sewer, or to 
public or private sewage disposal. 

1009.2 Approval. The size, type, and location of 
each interceptor (clarifier) or separator shall be 
approved by the Authority Having Jurisdiction. 
Except where otherwise specifically permitted, no 
wastes other than those requiring treatment or sepa- 
ration shall be discharged into any interceptor (clari- 
fier). 

1009.3 Design. Interceptors (clarifiers) for sand and 
similar heavy solids shall be so designed and located 
as to be readily accessible for cleaning and shall have 
a water seal of not less than six (6) inches (152 mm). 

1009.4 Relief Vent. Interceptors (clarifiers) shall be 
so designed that they will not become air-bound if 
closed covers are used. Each interceptor (clarifier) 
shall be properly vented. 

1009.5 Location. Each interceptor (clarifier) cover 
shall be readily accessible for servicing and main- 
taining the interceptor (clarifier) in working and 
operating condition. The use of ladders or the 
removal of bulky equipment in order to service inter- 
ceptors (clarifiers) shall constitute a violation of 
accessibility. Location of all interceptors (clarifiers) 
shall be shown on the approved building plan. 

1009.6 Maintenance of Interceptors. Interceptors 
shall be maintained in efficient operating condition 



148 



TRAPS AND INTERCEPTORS 



1009.6-1014.2 



by periodic removal of accumulated grease, scum, 
oil, or other floating substances and solids deposited 
in the interceptor. 

1009.7 Discharge. The waste pipe from oil and sand 
interceptors shall discharge as approved by the 
Authority Having Jurisdiction. 

1010.0 Slaughterhouses, Packing Establishments, 
etc. 

Every fish, fowl, and animal slaughterhouse or estab- 
lishment; every fish, fowl, and meat packing or cur- 
ing establishment; every soap factory, tallow-render- 
ing, fat-rendering, and hide-curing establishment 
shall be connected to and shall drain or discharge 
into an approved grease interceptor (clarifier). 

1011.0 Minimum Requirements for Auto Wash 
Racks. 

Every private or public wash rack and /or floor or 
slab used for cleaning machinery or machine parts 
shall be adequately protected against storm or sur- 
face water and shall drain or discharge into an 
approved interceptor (clarifier). 

1012.0 Commercial and Industrial Laundries. 

Laundry equipment in commercial and industrial 
buildings that does not have integral strainers shall 
discharge into an interceptor having a wire basket or 
similar device that is removable for cleaning and that 
will prevent passage into the drainage system of 
solids one-half (1/2) inch (12.7 mm) or larger in max- 
imum dimension, such as string, rags, buttons, or 
other solid materials detrimental to the public sewer- 
age system. 

1013.0 Bottling Establishments. 

Bottling plants shall discharge their process wastes 
into an interceptor that will provide for the separa- 
tion of broken glass or other solids, before discharg- 
ing liquid wastes into the drainage system. 

1 01 4.0 Grease Interceptors. 

1014.1 Where it is determined by the Authority 
Having Jurisdiction that waste pretreatment is 
required, an approved type of grease interceptor(s) 
complying with the provisions of this section shall be 
correctly sized and properly installed in grease waste 
line(s) leading from sinks and drains, such as floor 
drains, floor sinks and other fixtures or equipment in 
serving establishments such as restaurants, cafes, 
lunch counters, cafeterias, bars and clubs, hotels, 
hospitals, sanitariums, factory or school kitchens, or 
other establishments where grease is introduced into 
the drainage or sewage system in quantities that can 



effect line stoppage or hinder sewage treatment or 
private sewage disposal. Any combination of 
hydromechanical, gravity grease interceptors and 
engineered systems shall be allowed in order to meet 
this code and other applicable requirements of the 
Authority Having Jurisdiction when space or exist- 
ing physical constraints of existing buildings necessi- 
tate such installations. A grease interceptor shall not 
be required for individual dwelling units or for any 
private living quarters. Water closets, urinals, and 
other plumbing fixtures conveying human waste 
shall not drain into or through the grease interceptor. 

1014.1.1 Each fixture discharging into a grease 
interceptor shall be individually trapped and 
vented in an approved manner. 

1014.1.2 All grease interceptors shall be main- 
tained in efficient operating condition by period- 
ic removal of the accumulated grease and latent 
material No such collected grease shall be intro- 
duced into any drainage piping or public or pri- 
vate sewer. If the Authority Having Jurisdiction 
determines that a grease interceptor is not being 
properly cleaned or maintained, the Authority 
Having Jurisdiction shall have the authority to 
mandate the installation of additional equip- 
ment or devices and to mandate a maintenance 
program. 

1014.1.3 Food Waste Disposal Units and 
Dishwashers. Unless specifically required or 
permitted by the Authority Having Jurisdiction, 
no food waste disposal unit or dishwasher shall 
be connected to or discharge into any grease 
interceptor. Commercial food waste disposers 
shall be permitted to discharge directly into the 
building's drainage system. 

1014.2 Hydromechanical Grease Interceptors. 

1014.2.1 Plumbing fixtures or equipment con- 
nected to a Type A and B hydromechanical 
grease interceptor shall discharge through an 
approved type of vented flow control installed 
in a readily accessible and visible location. Flow 
control devices shall be designed and installed 
so that the total flow through such device or 
devices shall at no time be greater than the rated 
flow of the connected grease interceptor. No | 
flow control device having adjustable or remov- 
able parts shall be approved. The vented flow 
control device shall be located such that no sys- 
tem vent shall be between the flow control and 
the grease interceptor inlet. The vent or air inlet | 
of the flow control device shall connect with the 
sanitary drainage vent system, as elsewhere 
required by this code, or shall terminate through 
the roof of the building, and shall not terminate 
to the free atmosphere inside the building. 



149 



101 4.2 -Table 10-2 



UNIFORM PLUMBING CODE 



Exception: Listed grease interceptors with 
integral flow controls or restricting devices 
shall be installed in an accessible location in 
accordance with the manufacturers 7 instruc- 
tions. 

1014.2.2 The total capacity in gallons (L) of fix- 
tures discharging into any hydromechanical 
grease interceptor shall not exceed two and one- 
half (2-1/2) times the certified GPM (L/m) flow 
rate of the interceptor as per Table 10-2. 

For the purpose of this section, the term "fix- 
ture" shall mean and include each plumbing fix- 
ture, appliance, apparatus, or other equipment 
required to be connected to or discharged into a 
grease interceptor by any provision of this sec- 
tion. 

1014.2.3 A vent shall be installed downstream 
of hydromechanical grease interceptors in accor- 
dance with the requirements of this code. 



1014.3 Gravity Grease Interceptors. Required 
gravity grease interceptors shall comply with the 
provisions of Sections 1014.3.1 through 1014.3.7. 

1014.3.1 General. The provisions of this section 
shall apply to the design, construction, installa- 
tion, and testing of commercial kitchen gravity 
grease interceptors, 

1014.3.2 Waste Discharge Requirements. 
1014.3.2.1 Waste discharge in establish- 
ments from fixtures and equipment which 
contain grease, including but not limited to, 
scullery sinks, pot and pan sinks, dishwash- 
ers, soup kettles, and floor drains located in 
areas where grease-containing materials 
exist, shall be permitted to be drained into 
the sanitary waste through the interceptor 
when approved by the Authority Having 
Jurisdiction. 



TABLE 10-2 
Hydro-mechanical Interceptor Sizing Using Gravity Flow Rates 1 


Diameter of Grease 
Waste Pipe 


Maximum Full Pipe 
Flow (gpm) 2 


Size of Grease Interceptor 

One-Minute Drainage Two-Minute Drainage 
Period (gpm) Period (gpm) 


2" 
3" 
4" 
5" 
6" 




20 
60 
125 
230 

375 


20 
75 
150 
250 
500 




10 

35 
75 
125 
250 



J For interceptor sizing by fixture capacity see the example below. 

2 1 /4" (.240) slope per foot based on Manning's formula with friction factor N ■- 



.012 



EXAMPLE FOR SIZING 
HYDROMECHANICAL INTERCEPTOR(S) USING FIXTURE CAPACITY 

Step 1 : Determine the flow rate from each fixture. 

[Length] X [Width] X [Depth] / [231] - Gallons X [75 fill factor] / [Drain Period (1 min or 2 min)] 

Step 2; Calculate the total load from all fixtures that discharge into the interceptor. 

Fixtures Compartments Load (gallons) Size of Grease Interceptor 

One-Minute Drainage Two-Minute Drainage 
Period (gpm) Period (gpm) 



Compartment size 

24"x24"xl2" 

Hydrant 

Rated Appliance 



44.9 

3 

2 
49.9 



50 



25 



150 



TRAPS AND INTERCEPTORS 



Table 10-3- 1015.1 



Table 10-3 
Gravity Grease Interceptor Sizing 



DFUs (1,3) 


Interceptor Volume (2) 


8 


500 gallons 


21 


750 gallons 


35 


1,000 gallons 


90 


1,250 gallons 


172 


1,500 gallons 


216 


2,000 gallons 


307 


2,500 gallons 


342 


3,000 gallons 


428 


4,000 gallons 


576 


5,000 gallons 


720 


7,500 gallons 


2112 


10,000 gallons 


2640 


15,000 gallons 



Notes 

(1 ) The maximum allowable DFUs plumbed to the kitchen drain lines that will be connected to the grease interceptor. 

(2) This size is based on: DFUs, the pipe size from this code; Table 7-5; Useful Tables for flow in half-full pipes (ref: Mohinder 
Nayyar Piping Handbook, 3rd Edition, 1992). Based on 30-minute retention time (ref.: George Tchobanoglous and Metcalf & 
Eddy. Wastewater Engineering Treatment, Disposal and Reuse, 3rd Ed. 1991 & Ronald Crites and George Tchobanoglous. Small and 
Decentralized Wastewater Management Systems, 1998). Rounded up to nominal interceptor volume. 

(3) When the flow rate of directly connected fixture(s) or appliance(s) have no assigned DFU values, the additional grease inter- 
ceptor volume shall be based on the known flow rate (gpm) multiplied by 30 minutes. 



1014.3.2.2 Toilets, urinals, and other similar 
fixtures shall not drain through the interceptor. 

1014.3.2.3 All waste shall enter the intercep- 
tor through the inlet pipe only. 

1014.3.3 Design. 

1014.3.3.1 Gravity Interceptors shall be con- 
structed in accordance with the applicable 
standard in Table 14-1 or the design 
approved by the Authority Having 
Jurisdiction. 

1014.3.4 Location. 

1014.3.4.1 Each grease interceptor shall be 
so installed and connected that it shall be at 
all times easily accessible for inspection, 
cleaning, and removal of the intercepted 
grease. A gravity grease interceptor comply- 
ing with IAPMO Z1001, shall not be installed 
in any part of a building where food is han- 
dled. Location of the grease interceptor shall 
meet the approval of the Authority Having 
Jurisdiction. 

1014.3.4.2 Interceptors shall be placed as 
close as practical to the fixtures they serve. 

1014.3.4.3 Each business establishment for 
which a gravity grease interceptor is 
required shall have an interceptor which 
shall serve only that establishment unless 
otherwise approved by the Authority 
Having Jurisdiction. 

1014.3.4.4 Each gravity grease interceptor 
shall be located so as to be readily accessible 
to the equipment required for maintenance. 



1014.3.5 Construction Requirements. 

1014.3.5.1 Purpose. Gravity grease inter- 
ceptors shall be designed to remove grease 
from effluent and shall be sized in accor- 
dance with this section. Gravity grease inter- 
ceptors shall also be designed to retain 
grease until accumulations can be removed 
by pumping the interceptor. It is recom- 
mended that a sample box be located at the 
outlet end of all gravity grease interceptors 
so that the Authority Having Jurisdiction can 
periodically sample effluent quality. 

1014.3.6 Sizing Criteria. 

1014.3.6.1 Sizing. The volume of the inter- 
ceptor shall be determined by using Table 
10-3. If drainage fixture units (DFUs) are not 
known, the interceptor shall be sized based 
on the maximum DFUs allowed for the pipe 
size connected to the inlet of the interceptor. 
Refer to Table 7-5, Drainage Piping, 
Horizontal. 

1014.3.7 Abandoned Gravity Grease 
Interceptors. Abandoned grease interceptors 
shall be pumped and filled as required for aban- 
doned sewers and sewage disposal facilities in 
Section 722.0. 

1015.0 FOG (Fats, Oils, and Greases) Disposal 
System. 

1015.1 Purpose. The purpose of this section is to 
provide the necessary criteria for the sizing, applica- 
tion, and installation of FOG disposal systems desig- 



151 



1015.1 -1017.1 



UNIFORM PLUMBING CODE 



nated as a pretreatment or discharge water quality 
compliance strategy. 

1015.2 Scope. FOG disposal systems shall be con- 
sidered engineered systems and shall comply with 
the requirements of Section 301.4 of this code. 

1015.3 Components, Materials, and Equipment. 

FOG disposal systems, including all components, 
materials, and equipment necessary for the proper 
function of the system, shall comply with Sections 
301.1.3 or 301.2 of this code. 

1015.4 Sizing Application and installation. FOG 

disposal systems shall be engineered, sized, and 
installed in accordance with the manufacturers' spec- 
ifications and as specified in ASME Al 12.14.6, as list- 
ed in Chapter 14, Table 14-1 of this code. 

1015.5 Performance. FOG disposal systems shall be 
tested and certified as listed in Chapter 14, Table 14-1 
of this code, and other national consensus standards 
applicable to FOG disposal systems as discharging a 
maximum of 100 mg/L FOG. 

Gravity Grease Interceptor Sizing Example: 

Given: A restaurant with the following fixtures and equip- 
ment. 

One food preparation sink; three floor drains - one in the food 
prep area, one in the grill area, and one receiving the indirect 
waste from the ice machine and a mop sink. 

Kitchen Drain Line DFU Count (from Table 7-3): 



3 floor drains @ 2 DFUs each = 
Mop sink @ 3 DFUs each = 
Food prep sink @ 3 DFUs each = 
Total 



6 DFUs 

3 DFUs 

3 DFUs 

12 DFUs 



Using Table 10-3, the grease interceptor will be sized at 750 
gallons. 

1016.0 Sand Interceptors. 

1016.1 Where Required. 

1016.1.1 Whenever the discharge of a fixture or 
drain contain solids or semi-solids heavier than 
water that would be harmful to a drainage sys- 
tem or cause a stoppage within the system, the 
discharge shall be through a sand interceptor. 
Multiple floor drains shall be permitted to dis- 
charge into one sand interceptor. 

1016.1.2 Sand interceptors are required when- 
ever the Authority Having Jurisdiction deems it 
advisable to have a sand interceptor to protect 
the drainage system. 



1016.2 Construction and Size. Sand interceptors 
shall be built of brick or concrete, prefabricated coat- 
ed steel, or other watertight material. The interceptor 
shall have an interior baffle for full separation of the 
interceptor into two (2) sections. The outlet pipe shall 
be the same size as the inlet pipe of the sand inter- 
ceptor, the minimum being three (3) inches (80 mm), 
and the baffle shall have two (2) openings of the 
same diameter as the outlet pipe and at the same 
invert as the outlet pipe. These openings shall be 
staggered so that there cannot be a straight line flow 
between any inlet pipe and the outlet pipe. The 
invert of the inlet pipe shall be no lower than the 
invert of the outlet pipe. 

The sand interceptor shall have a minimum 
dimension of two (2) feet square (0.19 m 2 ) for the net 
free opening of the inlet section and a minimum 
depth under the invert of the outlet pipe of two (2) 
feet (610 mm). 

For each five (5) gallons (18.9 L) per minute flow 
or fraction thereof over twenty (20) gallons (75.7 L) 
per minute, the area of the sand interceptor inlet sec- 
tion is to be increased by one (1) square foot (0.09 
m 2 ). The outlet section shall at all times have a mini- 
mum area of fifty (50) percent of the inlet section. 

The outlet section shall be covered by a solid 
removable cover, set flush with the finished floor, 
and the inlet section shall have an open grating, set 
flush with the finished floor and suitable for the traf- 
fic in the area in which it is located. 

1016.3 Separate Use. Sand and similar interceptors 
for every solid shall be so designed and located as to 
be readily accessible for cleaning, shall have a water 
seal of not less than six (6) inches (152 mm), and shall 
be vented. 

1017.0 Oil and Flammable Liquid Interceptors. 

1017.1 Interceptors Required. All repair garages 
and gasoline stations with grease racks or grease 
pits, and all factories that have oily, flammable, or 
both types of wastes as a result of manufacturing, 
storage, maintenance, repair, or testing processes, 
shall be provided with an oil or flammable liquid 
interceptor that shall be connected to all necessary 
floor drains. The separation or vapor compartment 
shall be independently vented to the outer air. If two 
(2) or more separation or vapor compartments are 
used, each shall be vented to the outer air or shall be 
permitted to connect to a header that is installed at a 
minimum of six (6) inches (152 mm) above the spill 
line of the lowest floor drain and vented indepen- 
dently to the outer air. The minimum size of a 
flammable vapor vent shall be not less than two (2) 
inches (50 mm), and, when vented through a side- 



152 



TRAPS AND INTERCEPTORS 1017.1 - 1017.2 

wall, the vent shall be not less than ten (10) feet 
(3,048 mm) above the adjacent level at an approved 
location. The interceptor shall be vented on the 
sewer side and shall not connect to a flammable 
vapor vent. All oil and flammable interceptors shall 
be provided with gastight cleanout covers that shall 
be readily accessible. The waste line shall be not less 
than three (3) inches (80 mm) in diameter with a full- 
size cleanout to grade. When an interceptor is pro- 
vided with an overflow, it shall be provided with an 
overflow line (not less than two (2) inches (50 mm) in 
diameter) to an approved waste oil tank having a 
minimum capacity of five-hundred fifty (550) gallons 
(2,082 L) and meeting the requirements of the 
Authority Having Jurisdiction. The waste oil from 
the separator shall flow by gravity or shall be 
pumped to a higher elevation by an automatic 
pump. Pumps shall be adequately sized and accessi- 
ble. Waste oil tanks shall have a two (2) inch (50 mm) 
minimum pump-out connection at grade and a one 
and one-half (1-1/2) inch (40 mm) minimum vent to 
atmosphere at an approved location not less than ten 
(10) feet (3,048 mm) above grade. 

1017.2 Design of Interceptors. Each manufactured 
interceptor that is rated shall be stamped or labeled 
by the manufacturer with an indication of its full dis- 
charge rate in gpm (L/m). The full discharge rate to 
such an interceptor shall be determined at full flow. 
Each interceptor shall be rated equal to or greater 
than the incoming flow and shall be provided with 
an overflow line to an underground tank. 

Interceptors not rated by the manufacturer shall 
have a depth of not less than two (2) feet (610 mm) 
below the invert of the discharge drain. The outlet 
opening shall have not less than an eighteen (18) inch 
(457 mm) water seal and shall have a minimum 
capacity as follows: Where not more than three (3) 
motor vehicles are serviced and /or stored, intercep- 
tors shall have a minimum capacity of six (6) cubic 
feet (0.17 m 3 ), and one (1) cubic foot (0.03 m 3 ) of 
capacity shall be added for each vehicle up to ten (10) 
vehicles. Above ten (10) vehicles, the Authority 
Having Jurisdiction shall determine the size of the 
interceptor required. Where vehicles are serviced 
only and not stored, interceptor capacity shall be 
based on a net capacity of one (1) cubic foot (0.03 m 3 ) 
for each one-hundred (100) square feet (9.29 m 2 ) of 
surface to be drained into the interceptor, with a min- 
imum of six (6) cubic feet (0.17 m 3 ). 



153 



UNIFORM PLUMBING CODE 



154 



CHAPTER 11 

STORM DRAINAGE 



1101.0 General. 

1101.1 Where Required. Roofs, paved areas, yards, 
courts, and courtyards shall be drained into a sepa- 
rate storm sewer system, or into a combined sewer 
system where a separate storm sewer system is not 
available, or to some other place of disposal satisfac- 
tory to the Authority Having Jurisdiction. In the case 
of one- and two-family dwellings, storm water shall 
be permitted to be discharged on flat areas, such as 
streets or lawns, so long as the storm water shall 
flow away from the building and away from 
adjoining property, and shall not create a nuisance. 

1101.2 Storm Water Drainage to Sanitary Sewer 
Prohibited. Storm water shall not be drained into 
sewers intended for sanitary drainage only. 

1101.3 Material Uses. Rainwater piping placed 
within the interior of a building or run within a vent 
or shaft shall be of cast-iron, galvanized steel, 
wrought iron, brass, copper, lead, Schedule 40 ABS 
DWV, Schedule 40 PVC DWV, stainless steel 304 or 
316L (stainless steel 304 pipe and fittings shall not be 
installed underground and shall be kept not less 
than six (6) inches (152 mm) above ground), or other 
approved materials, and changes in direction shall 
conform to the requirements of Section 706.0. ABS 
and PVC DWV piping installations shall be installed 
in accordance with IS 5, IS 9, and Chapter 15 
"Firestop Protection/' Except for individual single- 
family dwelling units, materials exposed within 
ducts or plenums shall have a flame-spread index of 
a maximum of twenty-five (25) and a smoke-devel- 
oped index of a maximum of fifty (50), when tested 
in accordance with the Test for Surface-Burning Char- 
acteristics of the Building Materials (see the Building 
Code standards based on ASTM E84 and UL 723.). 

1101.4 Expansion Joints Required. Expansion 
joints or sleeves shall be provided where warranted 
by temperature variations or physical conditions. 

1101.5 Subsoil Drains. 

1101.5.1 Subsoil drains shall be provided 
around the perimeter of buildings having base- 
ments, cellars, crawl spaces or floors below 
grade. Such subsoil drains shall be permitted to 
be positioned inside or outside of the footing, 
shall be of perforated or open-jointed approved 
drain tile or pipe, not less than three (3) inches 
(80 mm) in diameter, and shall be laid in gravel, 
slag, crushed rock, approved three-quarter (3/4) 
inch (19.1 mm) crushed, recycled glass aggre- 



gate, or other approved porous material with 
not less than four (4) inches (102 mm) 
surrounding the pipe on all sides. Filter media 
shall be provided for exterior subsoil piping. 

1 101 .5.2 Subsoil drains shall be piped to a storm 
drain, to an approved water course, to the front 
street curb or gutter, to an alley, or the discharge 
from the subsoil drains shall be conveyed to the 
alley by a concrete gutter. Where a continuously 
flowing spring or groundwater is encountered, 
subsoil drains shall be piped to a storm drain or 
an approved water course. 

1101.5.3 Where it is not possible to convey the 
drainage by gravity, subsoil drains shall 
discharge to an accessible sump provided with 
an approved automatic electric pump. The sump 
shall be not less than fifteen (15) inches (381 mm) 
in diameter, eighteen (18) inches (457 mm) in 
depth, and provided with a fitted cover. The 
sump pump shall have an adequate capacity to 
discharge all water coming into the sump as it 
accumulates to the required discharge point, and 
the capacity of the pump shall be not less than 
fifteen (15) gpm (56.8 L/m). The discharge 
piping from the sump pump shall be not less 
than of one and one-half (1-1/2) inches (40 mm) 
in diameter and have a union or other approved 
quick-disconnect assembly to make the pump 
accessible for servicing. 

1101.5.4 For separate dwellings not serving 
continuously flowing springs or groundwater, 
the sump discharge pipe shall be permitted to 
discharge onto a concrete splash block with a 
minimum length of twenty-four (24) inches (610 
mm). This pipe shall be within four (4) inches 
(102 mm) of the splash block and positioned to 
direct the flow parallel to the recessed line of the 
splash block. 

1101.5.5 Subsoil drains subject to backflow 
when discharging into a storm drain shall be 
provided with a backwater valve in the drain 
line so located as to be accessible for inspection 
and maintenance. 

1101.5.6 Nothing in Section 1101.5 shall prevent 
drains that serve either subsoil drains or 
areaways of a detached building from 
discharging to a properly graded open area, 
provided that: 

(1) They do not serve continuously flowing 
springs or groundwater; 



155 



1101.5-1101.11 



UNIFORM PLUMBING CODE 



(2) 



(3) 



The point of discharge is not less than ten 
(10) feet (3,048 mm) from any property line; 
and 



It is impracticable to discharge such drains 
to a storm drain, to an approved water 
course, to the front street curb or gutter, or 
to an alley. 

1101.6 Building Subdrains. Building subdrains 
located below the public sewer level shall discharge 
into a sump or receiving tank, the contents of which 
shall be automatically lifted and discharged into the 
drainage system as required for building sumps. 

1101.7 Areaway Drains. Open subsurface space 
adjacent to a building, serving as an entrance to the 
basement or cellar of a building, shall be provided 
with a drain or drains. Such areaway drains shall be 
not less than two (2) inches (50 mm) in diameter for 
areaways at a maximum of one-hundred (100) 
square feet (9.3 m 2 ) in area, and shall be discharged 
in the manner provided for subsoil drains not 
serving continuously flowing springs or ground- 
water (see Section 1101.5.2). Areaways in excess of 
one-hundred (100) square feet (9.3 m 2 ) shall not drain 
into subsoil drains. Areaway drains for areaways 
exceeding one-hundred (100) square feet (9.3 m 2 ) 
shall be sized according to Table 11-2. 

1101.8 Window Areaway Drains. Window areaways 
at a maximum of ten (10) square feet (0.9 m 2 ) in area 
shall be permitted to discharge to the subsoil drains 
through a two (2) inch (50 mm) pipe. However, 
window areaways exceeding ten (10) square feet (0.9 
m 2 ) in area shall be handled in the manner provided 
for entrance areaways (see Section 1101.7). 

1101.9 Filling Stations and Motor Vehicle Washing 
Establishments. Public filling stations and motor 
vehicle washing establishments shall have the paved 
area sloped toward sumps or gratings within the 
property lines. Curbs not less than six (6) inches (152 
mm) high shall be placed where required to direct 
water to gratings or sumps. 

1101.10 Paved Areas. Where the occupant creates 
surface water drainage, the sumps, gratings, or floor 
drains shall be piped to a storm drain or an 
approved water course. 

1101.11 Roof Drainage. 

1101.11.1 Primary Roof Drainage. Roof areas 
of a building shall be drained by roof drains or 
gutters. The location and sizing of drains and 
gutters shall be coordinated with the structural 
design and pitch of the roof. Unless otherwise 
required by the Authority Having Jurisdiction, 
roof drains, gutters, vertical conductors or 
leaders, and horizontal storm drains for primary 
drainage shall be sized based on a storm of sixty 



(60) minutes duration and one-hundred (100) 
year return period. Refer to Table D-l (in 
Appendix D) for one-hundred (100) year, sixty 
(60) minute storms at various locations. 
1101.11.2 Secondary drainage. Secondary 
(emergency) roof drainage shall be provided by 
one (1) of the methods specified in Section 
1101.11.2.1 or 1101.11.2.2. 

1101.11.2.1 Roof Scuppers or Open Side. 

Secondary roof drainage shall be provided 
by an open-sided roof or scuppers where the 
roof perimeter construction extends above 
the roof in such a manner that water will be 
entrapped. An open-sided roof or scuppers 
shall be sized to prevent the depth of 
ponding water from exceeding that for 
which the roof was designed as determined 
by Section 1101.11,1. Scupper openings 
shall be not less than of four (4) inches (102 
mm) high and have a width equal to the 
circumference of the roof drain required for 
the area served, sized by Table 11-1. 

1101.11.2.2 Secondary Roof Drain. 
Secondary roof drains shall be provided. 
The secondary roof drains shall be located 
not less than two (2) inches (51 mm) above 
the roof surface. The maximum height of 
the roof drains shall be a height to prevent 
the depth of ponding water from exceeding 
that for which the roof was designed as 
determined by Section 1101.11.1. The 
secondary roof drains shall connect to a 
piping system conforming to Section 
1101.11.2.2.1 or 1101.11.2.2.2. 

1101.11.2.2.1 Separate Piping 
System. The secondary roof drainage 
system shall be a separate system of 
piping, independent of the primary roof 
drainage system. The discharge shall be 
above grade, in a location observable by 
the building occupants or maintenance 
personnel. Secondary roof drain 
systems shall be sized in accordance 
with Section 1101.11.1 based on the 
rainfall rate for which the primary 
system is sized. 

1101.11.2.2.2 Combined System. The 

secondary roof drains shall connect to 
the vertical piping of the primary storm 
drainage conductor downstream of any 
horizontal offset below the roof. The 
primary storm drainage system shall 
connect to the building storm water that 
connects to an underground public 
storm sewer. The combined secondary 



156 



STORM DRAINAGE 



1101.11 -1105.1 



and primary roof drain systems shall be 
sized in accordance with Section 1106.0 
based on double the rainfall rate for the 
local area. 

1101.12 Cleanouts. 

1101.12.1 Cleanouts for building storm drains 
shall comply with the requirements of Section 
719.0 of this code. 

1101.12.2 Rain leaders and conductors 
connected to a building storm sewer shall have a 
cleanout installed at the base of the outside 
leader or outside conductor before it connects to 
the horizontal drain. 

1101.13 Rainwater sumps serving "public use" 
occupancy buildings shall be provided with dual 
pumps arranged to function alternately in case of 
overload or mechanical failure. 



1102.0 Materials. 

1102.1 Conductors. 

1102.1.1 Conductors installed above ground in 
buildings shall be in accordance with the appli- 
cable standards referenced in Table 7-1 for above 
ground drain, waste and vent pipe. 

1102.1.2 The inside of conductors installed 
above ground level shall be of seamless copper 
water tube, Type K, L, or M; Schedule 40 copper 
pipe or Schedule 40 copper alloy pipe; Type 
DWV copper drainage tube; service weight cast- 
iron soil pipe or hubless cast-iron soil pipe; stan- 
dard weight galvanized steel pipe; stainless steel 
304 or 31 6L (stainless steel 304 pipe and fittings 
shall not be installed underground and shall be 
kept not less than (6) inches (152 mm) above 
ground); or Schedule 40 ABS or Schedule 40 
PVC plastic pipe. 

1102.2 Leaders. 

1102.2.1 Leaders installed outside shall be in 
accordance with the applicable standards refer- 
enced in Table 7-1 for above ground drain, waste 
and vent pipe; aluminum sheet metal; galva- 
nized steel sheet metal; or copper sheet metal. 

1102.3 Underground Building Storm Drains. 

Underground building storm drains shall be in 
accordance with the applicable standards referenced 
in Table 7-1 for underground drain, waste and vent 
pipe. 

1102.4 Building Storm Sewers. Building storm 
| sewers shall be in accordance with the applicable 

standards referenced in Table 7-1 for building sewer 
I Pipe- 

1102.5 Subsoil Drains. 

1102.5.1 Subsoil drains shall be constructed of 
materials specified in Table 14-1. 



1102.5.2 Subsoil drains shall be open-jointed or 
of perforated pipe, vitrified clay, plastic, cast- 
iron, or porous concrete. 

1103.0 Traps on Storm Drains and Leaders. 

1103.1 Where Required. Leaders and storm drains, 
when connected to a combined sewer, shall be 
trapped. Floor and area drains connected to a storm 
drain shall be trapped. 

Exception: Traps shall not be required where 
roof drains, rain leaders, and other inlets are at 
locations allowed under Section 906.0, Vent 
Termination. 

1103.2 Where Not Required. No trap shall be 
required for leaders or conductors that are connected 
to a sewer carrying storm water exclusively. 

1103.3 Trap Size. Traps, when installed for indi- 
vidual conductors, shall be the same size as the hori- 
zontal drain to which they are connected. 

1103.4 Method of Installation of Combined Sewer. 

Individual storm-water traps shall be installed on the 
storm-water drain branch serving each storm-water 
inlet, or a single trap shall be installed in the main 
storm drain just before its connection with the 
combined building sewer. Such traps shall be 
provided with an accessible cleanout on the outlet 
side of the trap. 

1104.0 Leaders, Conductors, and Connections. 

1104.1 Improper Use. Leaders or conductors shall 
not be used as soil, waste, or vent pipes nor shall 
soil, waste, or vent pipes be used as leaders or 
conductors. 

1104.2 Protection of Leaders. Leaders installed 
along alleyways, driveways, or other locations where 
exposed to damage shall be protected by metal 
guards, recessed into the wall, or constructed from 
ferrous pipe. 

1104.3 Combining Storm with Sanitary Drainage. 

The sanitary and storm drainage system of a 
building shall be entirely separate, except where a 
combined sewer is used, in which case the building 
storm drain shall be connected in the same hori- 
zontal plane through single wye fittings to the 
combined building sewer not less than ten (10) feet 
(3,048 mm) downstream from any soil stack. 

1105.0 Roof Drains. 

1105.1 Material. 

1105.1.1 Roof drains shall be constructed of 
materials specified in Table 14-1. 

1105.1.2 Roof drains shall be of cast-iron, 
copper or copper alloy, lead, or plastic. 



157 



1105.2-1108.1 



UNIFORM PLUMBING CODE 



1105.2 Dome or Strainer for General Use. Roof 
drains and overflow drains, except those draining to 
hanging gutters, shall be equipped with strainers 
extending not less than four (4) inches (102 mm) 
above the surface of the roof immediately adjacent to 
the drain. Strainers shall have a minimum inlet area 
above the roof level not less than one and one-half 
(1-1/2) times the area of the conductor or leader to 
which the drain is connected. 

1105.3 Strainers for Flat Decks. Roof drain 
strainers for use on sun decks, parking decks, and 
similar areas that are normally serviced and main- 
tained, shall be permitted to be of the flat surface 
type. Such roof drain strainers shall be level with the 
deck and shall have an available inlet area of not less 
than two (2) times the area of the conductor or leader 
to which the drain is connected. 

1105.4 Roof Drain Flashings. Connection between 
the roof and roof drains that pass through the roof 
and into the interior of the building shall be made 
water tight by the use of proper flashing material. 

1105.4.1 Where lead flashing material is used, it 
shall be not less than four (4) pounds per square 
foot (19.5 kg/m 2 ). 

1105.4.2 Where copper flashing material is 
used, it shall be not less than twelve (12) ounces 
per square foot (3.7 kg/m 2 ). 



add 50 percent of the remaining height of the I 
highest wall 

(4) Two (2) opposite walls of same height - add no 
additional area. 

(5) Two (2) opposite walls of differing heights - add 
50 percent of the wall area above the top of 
lower wall. 

(6) Walls on three (3) sides - add 50 percent of the 
area of the inner wall below the top of the lowest 
wall, plus allowance for the area of the wall 
above the top of the lowest wall, per (3) and (5) | 
above. 

(7) Walls on four (4) sides - no allowance for 
wall areas below the top of the lowest wall - add 
for areas above the top of the lowest 
wall per (1), (3), (5), and (6) above. | 



1107.0 Values for Continuous Flow. 

Where there is a continuous or semi-continuous 
discharge into the building storm drain or building 
storm sewer, as from a pump, ejector, air-condi- 
tioning plant, or similar device, one (1) gpm (3.8 
L/min.) of such discharge shall be computed as 
being equivalent to twenty-four (24) square feet (2.2 
m 2 ) of roof area, based upon a rate of rainfall of four 
(4) inches (102 mm) per hour. 



1106.0 Size of Leaders, Conductors, and Storm 
Drains. 

1106.1 Vertical Conductors and Leaders. Vertical 
conductors and leaders shall be sized on the basis of 
the maximum projected roof area and Table 11-1. 

1106.2 Size of Horizontal Storm Drains and 
Sewers. The size of building storm drains or 
building storm sewers or any of their horizontal 
branches shall be based upon the maximum 
projected roof or paved area to be handled and Table 
11-2. 

1106.3 Size of Roof Gutters. The size of semi- 
circular gutters shall be based on the maximum 
projected roof area and Table 11-3. 

1106.4 Side Walls Draining onto a Roof. Where 
vertical walls project above a roof so as to permit 
storm water to drain to the roof area below, the adja- 
cent roof area shall be permitted to be computed 
from Table 11-1 as follows: 

(1) For one (1) wall - add 50 percent of the wall area 
to the roof area figures. 

| (2) For two (2) adjacent walls of equal height - add 
35 percent of the total wall areas. 

1(3) For two (2) adjacent walls of unequal height - 
add 35 percent of the total common height and 



1108.0 Controlled-Flow Roof Drainage. 

1108.1 Application. In lieu of sizing the storm 
drainage system in accordance with Section 1106.0, 
the roof drainage shall be permitted to be sized on 
the basis of controlled flow and storage of the storm 
water on the roof, provided the following conditions 
are met: 

(1) The water from a twenty-five (25) year- 
frequency storm shall not be stored on the roof 
exceeding twenty-four (24) hours. 

(2) During the storm, the water depth on the roof 
shall not exceed the depths specified in Table 11-4. 

(3) No less than two (2) drains shall be installed in 
roof areas of ten thousand (10,000) square feet 
(929.0 m 2 ) or less, and no less than one (1) addi- 
tional drain shall be installed for each ten thou- 
sand (10,000) square feet (929.0 m 2 ) of roof area 
exceeding ten thousand (10,000) square feet 
(929.0 m 2 ). 

(4) Each roof drain shall have a precalibrated, fixed 
(nonadjustable), and proportional weir 
(notched) in a standing water collar inside the 
strainer. No mechanical devices or valves shall 
be allowed. 



158 



STORM DRAINAGE 



Table 11-4- 1109.2 



TABLE 11-4 
Controlled-Flow Maximum Roof Water Depth 



TABLE 11-5 
Distance of Scupper Bottoms Above Roof 



Roof Rise,* 




Max Water Depth at Drain, 


Roof Rise,* 




Above Roof Level at Drain, 


Inches 


(mm) 


Inches 


(mm) 


Inches 


(mm) 


Inches 


(mm) 


Flat 


(Flat) 


3 


(76) 


Flat 


(Flat) 


3 


(76) 


2 


(51) 


4 


(102) 


2 


(51) 


4 


(102) 


4 


(102) 


5 


(127) 


4 


(102) 


5 


(127) 


6 


(152) 


6 


(152) 


6 


(152) 


6 


(152) 



* Vertical measurement from the roof surface at the drain to 
the highest point of the roof surface served by the drain, 
ignoring any local depression immediately adjacent to the 
drain. 

(5) Pipe sizing shall be based on the pre- 
calibrated rate of flow (gpm) of the pre- 
calibrated weir for the maximum allowable 
water depth, and Tables 11-1 and 11-2. 

(6) The height of stones or other granular material 
above the waterproofed surface shall not be 
considered in water depth measurement and 
the roof surface in the vicinity of the drain shall 
not be recessed to create a reservoir. 

(7) Roof design, where controlled-flow roof 
drainage is used, shall be such that the design 
roof live load is not less than thirty (30) pounds 
per square foot (146.5kg /m 2 ) to provide a safety 
factor exceeding the fifteen (15) pounds per 
square foot (73.2kg /m 2 ) represented by the 
depth of water stored on the roof as indicated in 
Table 11-4. 

(8) Scuppers shall be provided in parapet walls. The 
distance of scupper bottoms above the roof level 
at the drains shall not exceed the maximum 
distances specified in Table 11-5. 

(9) Scupper openings shall be not less than four (4) 
inches high and have a width equal to the 
circumference of the roof drain required for the 
area served, sized by Table 11-1. 

(10) Flashings shall extend above the top of the scup- 
pers. 

(11) At any wall or parapet, 45 degree (0.79 rad) 
cants shall be installed. 

(12) Separate storm and sanitary drainage systems 
shall be provided within the building. 

(13) Calculations for the roof drainage system shall 
be submitted along with the plans to the 
Authority Having Jurisdiction for approval. 

1 108.2 Setback Roofs. Drains on setback roofs shall 
be permitted to be connected to the controlled-flow 
drainage systems provided: 

(1) The setback is designed for storing water, or 

(2) The square footage of the setback drainage area 
is converted as outlined in Section 1108.0 to 



Vertical measurement from the roof surface at the drain to 

the highest point of the roof surface served by the drain, 

ignoring any local depression immediately adjacent to the 

drain. 

gpm, and the storm-water pipe sizes in the 

controlled-flow system are based on the sum of 

the loads. 

(3) The branch from each of the roof drains that are 
not provided with controlled flow shall be sized 
in accordance with Table 11-1. 



1109.0 Testing. 

1109.1 Testing Required. New building storm 
drainage systems and parts of existing systems that 
have been altered, extended, or repaired shall be 
tested as described in Sections 1109.2.1 or 1109.2.2 to 
disclose leaks and defects. 

1109.2 Methods of Testing Storm Drainage 
Systems. Except for outside leaders and perforated 
or open-jointed drain tile, the piping of storm drain 
systems shall be tested upon completion of the rough 
piping installation by water or air, except that plastic 
pipe shall not be tested with air, and proved tight. 
The Authority Having Jurisdiction shall be permitted 
to require the removal of any cleanout plugs to ascer- 
tain whether the pressure has reached parts of the 
system. One (1) of the following test methods shall 
be used: 

1109.2.1 Water Test. After piping has been 
installed, the water test shall be applied to the 
drainage system, either to the entire system or to 
sections. If the test is applied to the entire system, 
all openings in the piping shall be tightly closed 
except for the highest opening, and the system 
shall be filled with water to the point of over- 
flow. If the system is tested in sections, each 
opening shall be tightly plugged except for the 
highest opening of the section under test, and 
each section shall be filled with water, but no 
section shall be tested with less than a ten (10) 
foot (3,048 mm) head of water. In testing succes- 
sive sections, not less than the upper ten (10) feet 
(3,048 mm) of the next preceding section shall be 
tested so that no joint of pipe in the building 



159 



1109.2 



UNIFORM PLUMBING CODE 



(except the uppermost ten (10) feet (3,048 mm) of 
a roof drainage system, which shall be filled with 
water to the flood level of the uppermost roof 
drain) shall have been submitted to a test of less 
than a ten (10) foot (3,048 mm) head of water. 
The water shall be kept in the system or in the 
portion under test for not less than fifteen (15) 
minutes before inspection starts; the system shall 
then be tight at all points. 

1109.2.2 Air Test. The air test shall be made by 
attaching an air compressor testing apparatus to 
any suitable opening after closing other inlets and 
outlets to the system, forcing air into the system 
until there is a uniform gauge pressure of five (5) 
psi (34.5 kPa) or sufficient pressure to balance a 
column of mercury ten (10) inches (254 mm) in 
height. This pressure shall be held without intro- 
duction of additional air for a period of not less 
than fifteen (15) minutes. 

1109.2.3 Exceptions. When circumstances exist 
that make air and water tests described in 
Sections 1109.2.1 and 1109.2.2 above impractical, 
see Section 103.5.3.3. 



160 



STORM DRAINAGE 



Table 11-1 -Table 11-1 (Metric) 



TABLE 11-1 
Sizing Roof Drains, Leaders, and Vertical Rainwater Piping 2 



Size of Drain, Maximum Allowable Horizontal Projected Roof Areas 

Leader or Square Feet at Various Rainfall Rates 

Pipe, Flow, 
Inches gpm 1 

1in./h 2in./h 3"mJh 4 in./h 5 \r\Jh 6 in./h 7 in./h 8 in7h 9 inVh 10 in7h 11 mJh 12 in./h 



2 30 2,880 1,440 960 720 575 480 410 360 320 290 260 240 

3 92 8,800 4,400 2,930 2,200 1,760 1,470 1,260 1,100 980 880 800 730 

4 192 18,400 9,200 6,130 4,600 3,680 3,070 2,630 2,300 2,045 1,840 1,675 1,530 

5 360 34,600 17,300 11,530 8,650 6,920 5,765 4,945 4,325 3,845 3,460 3,145 2,880 

6 563 54,000 27,000 17,995 13,500 10,800 9,000 7,715 6,750 6,000 5,400 4,910 4,500 
8 1208 116,000 58,000 38,660 29,000 23,200 19,315 16,570 14,500 12,890 11,600 10,545 9,600 



TABLE 11-1 (Metric) 
Sizing Roof Drains, Leaders, and Vertical Rainwater Piping 2 3 



Size of Drain, 
Leader 
Pipe, Flow, 



Maximum Allowable Horizontal Projected Roof Areas 
or Square Meters at Various Rainfall Rates 



25 mm/h 50 mm/h 75 mm/h lOOmmti 125mmh 150mr^ 



"50 1.2 267.6 133.8 89.2 66.9 53.4 44.6 38.1 33.4 29.7 26.9 24.2 22.3 

80 5.8 817.5 408.8 272.2 204.4 163.5 136.6 117.1 102.2 91.0 81.8 74.3 67.8 

100 12.1 1,709.4 854.7 569.5 427.3 341.8 285.2 244.3 213.7 190.0 170.9 155.6 142.1 

125 22.7 3,214.3 1,607.2 1,071.1 803.6 642.9 535.6 459.4 401.8 357.2 321.4 292.2 267.6 

150 35.5 5,016.6 2,508.3 1,671.7 1,254.2 1,003.3 836.1 716.7 627.1 557.4 501.7 456.1 418.1 

200 76.2 10,776.4 5,388.2 3,591.5 2,694.1 2,155.3 1,794.4 1,539.4 1,347.1 1,197.5 1,077.6 979.6 897.4 

Notes: 

1 Maximum discharge capacity, gpm (L/~s) with approximately 1 3/4-inch (44 mm) head of water at the drain. 

For rainfall rates other than those listed, determine the allowable roof area by dividing the area given in the 1-inch /hour (25 
mm /hour) column by the desired rainfall rate. 

Vertical piping may be round, square, or rectangular. Square pipe shall be sized to enclose its equivalent roundpipe. Rectangular 
pipe shall have not less than the same cross-sectional area as its equivalent round pipe, except that the ratio of its side dimen- 
sions shall not exceed 3 to 1. 



161 



Table 11-2 



UNIFORM PLUMBING CODE 



TABLE 11-2 
Sizing of Horizontal Rainwater Piping 12 



Size of Flow at 

Pipe, 1/8 in./ft. Slope, 
Inches gpm 



Maximum Allowable Horizontal Projected Roof Areas 
Square Feet at Various Rainfall Rates 



1 inVh 



2in7h 



3in,/h 



4in./h 



5'mJh 



6 in./h 



3 


34 


3,288 


1,644 


1,096 


822 


657 


548 


4 


78 


7,520 


3,760 


2,506 


1,880 


1,504 


1,253 


5 


139 


13,360 


6,680 


4,453 


3,340 


2,672 


2,227 


6 


222 


21,400 


10,700 


7,133 


5,350 


4,280 


3,566 


8 


478 


46,000 


23,000 


15,330 


11,500 


9,200 


7,670 


10 


860 


82,800 


41,400 


27,600 


20,700 


16,580 


13,800 


12 


1,384' 


133,200 


66,600 


44,400 


33,300 


26,650 


22,200 


15 


2,473 


238,000 


119,000 


79,333 


59,500 


47,600 


39,650 


Size of 


Flow at 


Maximum Allowable Horizontal Projected Roof Areas 




Pipe, 


1/4 in./ft. Slope, 


i 


Square Feet at Various Rainfall Rates 




Inches 


gpm 


















1 inTh 


2 in./h 


3 in7h 


4in./h 


5 in7h 


6 in./h 


3 


48 


4,640 


2,320 


1,546 


1,160 


928 


773 


4 


110 


10,600 


5,300 


3,533 


2,650 


2,120 


1,766 


5 


196 


18,880 


9,440 


6,293 


4,720 


3,776 


3,146 


6 


314 


30,200 


15,100 


10,066 


7,550 


6,040 


5,033 


8 


677 


65,200 


32,600 


21,733 


16,300 


13,040 


10,866 


10 


1,214 


116,800 


58,400 


38,950 


29,200 


23,350 


19,450 


12 


1,953 


188,000 


94,000 


62,600 


47,000 


37,600 


31,350 


15 


3,491 


336,000 


168,000 


112,000 


84,000 


67,250 


56,000 



Size of Flow at 

Pipe, 1/2 inVft. Slope, 
Inches gpm 



Maximum Allowable Horizontal Projected Roof Areas 
Square Feet at Various Rainfall Rates 



1 mJh 



2in./h 



3 in./h 



4in7h 



5in./h 



6in7h 



3 
4 

5 
6 
8 

10 
12 
15 



68 

156 

278 

445 

956 

1,721 

2,768 

4,946 



6,576 

15,040 

26,720 

42,800 

92,000 

165,600 

266,400 

476,000 



3,288 

7,520 

13,360 

21,400 

46,000 

82,800 

133,200 

238,000 



2,192 

5,010 

8,900 

14,267 

30,650 

55,200 

88,800 

158,700 



1,644 

3,760 
6,680 
10,700 
23,000 
41,400 
66,600 
119,000 



1,310 

3,010 

5,320 

8,580 

18,400 

33,150 

53,200 

95,200 



1,096 

2,500 

4,450 

7,140 

15,320 

27,600 

44,400 

79,300 



Notes: 

: The sizing data for horizontal piping are based on the pipes flowing full. 

~ For rainfall rates other than those listed, determine the allowable roof area by dividing the area given in the one (1) inch /hour (25 
mm /hour) column by the desired rainfall rate. 



162 



STORM DRAINAGE 



Table 11-2 (Metric) 



TABLE 11-2 (Metric) 
Sizing of Horizontal Rainwater Piping 12 



Size of 


Flow at Maximum Allowable Horizontal Projected 


1 Roof Areas 




Pipe, 


10 mm/m Slope, 


Square Meters at Various Rainfall Rates 




mm 


L/s 














25 mm/h 


50 mm/h 


75 mm/h 


100 mm/h 


125 mm/h 


150 mm/h 


80 


2.1 305 


153 


102 


76 


61 


51 


100 


4.9 700 


350 


233 


175 


140 


116 


125 


8.8 1,241 


621 


414 


310 


248 


207 


150 


14.0 1,988 


994 


663 


497 


398 


331 


200 


30.2 4,273 


2,137 


1,424 


1,068 


855 


713 


250 


54.3 7,692 


3,846 


2,564 


1,923 


1,540 


1,282 


300 


87.3 12,375 


6,187 


4,125 


3,094 


2,476 


2,062 


375 


156.0 22,110 


11,055 


7,370 


5,528 


4,422 


3,683 



Size of Flow at 

Pipe, 20 mm/m Slope, 
mm L7s 



Maximum Allowable Horizontal Projected Roof Areas 
Square Meters at Various Rainfall Rates 







25 mm/h 


50 mm/h 


75 mm/h 


100 mm/h 


125 mm/h 


150 mm/h 


80 


3.0 


431 


216 


144 


108 


86 


72 


100 


6.9 


985 


492 


328 


246 


197 


164 


125 


12.4 


1,754 


877 


585 


438 


351 


292 


150 


19.8 


2,806 


1,403 


935 


701 


561 


468 


200 


42.7 


6,057 


3,029 


2,019 


1,514 


1,211 


1,009 


250 


76.6 


10,851 


5,425 


3,618 


2,713 


2,169 


1,807 


300 


123.2 


17,465 


8,733 


5,816 


4,366 


3,493 


2,912 


375 


220.2 


31,214 


15,607 


10,405 


7,804 


6,248 


5,202 


Size of 


Flow at 


Maximum Allowable Horizontal Projected Roof Areas 


Pipe, 


40 mm/m Slope 


'j 


Square I 


Meters at Various Rainfall Rates 




mm 


L/s 


















25 mm/h 


50 mm/h 


75 mm/h 


100 mm/h 


125 mm/h 


150 mm/h 


80 


4.3 


611 


305 


204 


153 


122 


102 


100 


9.8 


1,400 


700 


465 


350 


280 


232 


125 


17.5 


2,482 


1,241 


827 


621 


494 


413 


150 


28.1 


3,976 


1,988 


1,325 


994 


797 


663 


200 


60.3 


8,547 


4,273 


2,847 


2,137 


1,709 


1,423 


250 


108.6 


15,390 


7,695 


5,128 


3,846 


3,080 


2,564 


300 


174.6 


24,749 


12,374 


8,250 


6,187 


4,942 


4,125 


375 


312.0 


44,220 


22,110 


14,753 


11,055 


8,853 


7,367 



Notes: 

1 The sizing data for horizontal piping are based on the pipes flowing full. 

~ For rainfall rates other than those listed, determine the allowable roof area by dividing the area given in the one (1) inch /hour (25 
mm /hour) column by the desired rainfall rate. 



163 



Table 11-3 



UNIFORM PLUMBING CODE 







TABLE 11-3 












Size of Gutters 






Diameter of Gutter 












in Inches 




Maximum Rainfall in 


Inches per Hour 






1/16 in/ft. Slope 


2 


3 


4 


5 


6 


3 


340 


226 


170 


136 


113 


4 


720 


480 


360 


288 


240 


5 


1,250 


834 


625 


500 


416 


6 


1,920 


1,280 


960 


768 


640 


7 


2,760 


1,840 


1,380 


1,100 


918 


8 


3,980 


2,655 


1,990 


1,590 


1,325 


10 


7,200 


4,800 


3,600 


2,880 


2,400 


Diameter of Gutter 












in inches 




Maximum Rainfall in 


Inches per Hour 






1/8 inVft. Slope 


2 


3 


4 


5 


6 


3 


480 


320 


240 


192 


160 


4 


1,020 


681 


510 


408 


340 


5 


1,760 


1,172 


880 


704 


587 


6 


2,720 


1,815 


1,360 


1,085 


905 


7 


3,900 


2,600 


1,950 


1,560 


1,300 


8 


5,600 


3,740 


2,800 


2,240 


1,870 


10 


10,200 


6,800 


5,100 


4,080 


3,400 


Diameter of Gutter 












in Inches 




Maximum Rainfall in 


Inches per Hour 






1/4 in^ft. Slope 


2 


3 


4 


5 


6 


3 


680 


454 


340 


272 


226 


4 


1,440 


960 


720 


576 


480 


5 


2,500 


1,668 


1,250 


1,000 


834 


6 


3,840 


,2,560 


1,920 


1,536 


1,280 


7 


5,520 


* 3,680 


2,760 


2,205 


1,840 


8 


7,960 


5,310 


3,980 


3,180 


2,655 


10 


14,400 


9,600 


7,200 


5,750 


4,800 


Diameter of Gutter 












in Inches 




Maximum Rainfall in 


Inches per Hour 






1/2 in7ft. Slope 


2 


3 


4 


5 


6 


3 


960 


640 


480 


384 


320 


4 


2,040 


1,360 


1,020 


816 


680 


5 


3,540 


2,360 


1,770 


1,415 


1,180 


6 


5,540 


3,695 


2,770 


2,220 


1,850 


7 


7,800 


5,200 


3,900 


3,120 


2,600 


8 


11,200 


7,460 


5,600 


4,480 


3,730 


10 


20,000 


13,330 


10,000 


8,000 


6,660 



164 



STORM DRAINAGE 



Table 11-3 (Metric) 



TABLE 11-3 (Metric) 
Size of Gutters 



Diameter of 












Gutter in mm 




Maximum Rainfall 


in Millimeters 


per Hour 




5.2 mm/m Slope 


50.8 


76.2 


101.6 


127.0 


152.4 


80 


31.6 


21.0 


15.8 


12.6 


10.5 


100 


66.9 


44.6 


33.4 


26.8 


22.3 


125 


116.1 


77.5 


58.1 


46.5 


38.7 


150 


178.4 


119.1 


89.2 


71.4 


59.5 


175 


256.4 


170.9 


128.2 


102.2 


85.3 


200 


369.7 


246.7 


184.9 


147.7 


123.1 


250 


668.9 


445.9 


334.4 


267.6 


223.0 


Diameter of 












Gutter in mm 




Maximum Rainfall 


in Millimeters 


per Hour 




10.4 mm/m Slope 


50.8 


76.2 


101.6 


127.0 


152.4 


80 


44.6 


29.7 


22.3 


17.8 


14.9 


100 


94.8 


63.3 


47.4 


37.9 


31.6 


125 


163.5 


108.9 


81.8 


65.4 


54.5 


150 


252.7 


168.6 


126.3 


100.8 


84.1 


175 


362.3 


241.5 


181.2 


144.9 


120.8 


200 


520.2 


347.5 


260.1 


208.1 


173.7 


250 


947.6 


631.7 


473.8 


379 


315.9 


Diameter of 












Gutter in mm 




Maximum Rainfall 


in Millimeters 


per Hour 




20.8 mm/m Slope 


50.8 


76.2 


101.6 


127.0 


152.4 


80 


63.2 


42.2 


31.6 


25.3 


21.0 


100 


133.8 


89.2 


66.9 


53.5 


44.6 


125 


232.3 


155.0 


116.1 


92.9 


77.5 


150 


356.7 


237.8 


178.4 


142.7 


118.9 


175 


512.8 


341.9 


256.4 


204.9 


170.9 


200 


739.5 


493.3 


369.7 


295.4 


246.7 


250 


133.8 


891.8 


668.9 


534.2 


445.9 


Diameter of 












Gutter in mm 




Maximum Rainfall 


1 in Millimeters 


per Hour 




41 .7 mm/m Slope 


50.8 


76.2 


101.6 


127.0 


152.4 


80 


89.2 


59.5 


44.6 


35.7 


29.7 


100 


189.5 


126.3 


94.8 


75.8 


63.2 


125 


328.9 


219.2 


164.4 


131.5 


109.6 


150 


514.7 


343.3 


257.3 


206.2 


171.9 


175 


724.6 


483.1 


362.3 


289.9 


241 .4 


200 


1040.5 


693.0 


520.2 


416.2 


346.5 


250 


1,858.0 


1,238.4 


929.0 


743.2 


618.7 



165 



UNIFORM PLUMBING CODE 



166 



CHAPTER 12 

FUEL PIPING 



1201.0 Scope of Gas Piping. 

(A) Coverage of piping systems shall extend from 
the point of delivery to the connections with 
each gas utilization device. For other than undi- 
luted liquefied petroleum gas systems, the point 
of delivery shall be considered the outlet of the 
service meter assembly, or the outlet of the 
service regulator or service shutoff valve where 
no meter is provided. For undiluted liquefied 
petroleum gas systems, the point of delivery 
shall be considered the outlet of the final pres- 
sure regulator, exclusive of the line gas regulators, 
in the system. [NFPA 54:1.1.1.1(A)] 

(B) Piping systems requirements shall include 
design, materials, components, fabrications, 
assembly, installation, testing, inspection, opera- 
tion, and maintenance. [NFPA 54:1. 1.1. 1(C)] 

(C) This code shall not apply to the following (refer- 
ence standards for some of which appear in 
Chapter 14 [NFPA 54:1.1.1.2]): 

(1) Portable LP-Gas appliances of all types that 
are not connected to a fixed fuel piping 
system. 

(2) Installation of farm equipment such as 
brooders, dehydrators, dryers, and irriga- 
tion equipment. 

(3) Raw material (feedstock) applications, 
except for piping to special atmosphere 
generators. 

(4) Oxygen-fuel gas cutting and welding 
systems. 

(5) Industrial gas applications using gases such 
as acetylene and acetylenic compounds, 
hydrogen, ammonia, carbon monoxide, 
oxygen, and nitrogen. 

(6) Petroleum refineries, pipeline compressor or 
pumping stations, loading terminals, 
compounding plants, refinery tank farms, 
and natural gas processing plants. 

(7) Large integrated chemical plants or portions 
of such plants where flammable or 
combustible liquids or gases are produced 
by chemical reactions or used in chemical 
reactions. 

(8) LP-Gas installations at utility gas plants. 

(9) Liquefied natural gas (LNG) installations. 

I (10) Fuel gas piping in electric utility power 
plants. [NFPA 54-09:1.1.1.2(10)] 



(11) Proprietary items of equipment, apparatus, 
or instruments such as gas-generating sets, 
compressors, and calorimeters. 

(12) LP-Gas appliances for vaporization, gas 
mixing, and gas manufacturing. 

(13) LP-Gas piping for buildings under construc- 
tion or renovations that are not to become 
part of the permanent building piping 
system — that is, temporary fixed piping for 
building heat. 

(14) Installation of LP-Gas systems for railroad 
switch heating. 

(15) Installation of LP-Gas and compressed 
natural gas systems on vehicles. 

(16) Gas piping, meters, gas-pressure regulators, 
and other appurtenances used by the serving 
gas supplier in distribution of gas, other 
than undiluted LP-Gas. 

1202.0 General. 

The regulations of this chapter shall govern the 
installation of fuel gas piping in or in connection 
with any building, structure or within the property 
lines of any premises up to five (5) psi (34.5 kPa), 
other than service pipe. Fuel oil piping systems shall 
be installed in accordance with NFPA 31. 

1203.0 Definitions. 

For the purposes of this code, these definitions shall 
apply to this chapter. Certain terms, phrases, words, 
and their derivatives shall be interpreted as set forth 
in this section, provided, however, that whenever the 
words "gas meters" appear, they shall be construed 
to also mean valves and those devices required for 
the regulation of pressure and the measurement of 
natural gas being dispensed for any building, struc- 
ture, or premises. 

1203.1 Appliance Fuel Connector - An assembly 
of listed semi-rigid or flexible tubing and fittings to 
carry fuel between a fuel-piping outlet and a fuel- 
burning appliance. 

1203.2 Bonding Jumper - A reliable conductor to 
ensure the required electrical conductivity between 
metal parts required to be electrically connected. 
[NFPA 70:100.1] 

1203.3 Fuel Gas - Natural, manufactured, liquefied 
petroleum, or a mixture of these. 



167 



1203.4-1206.1 



UNIFORM PLUMBING CODE 



1203.4 Gas Piping - Any installation of pipe, 
valves, or fittings that is used to convey fuel gas, 
installed on any premises or in any building, but 
shall not include: 

(1) Any portion of the service piping. 

(2) Any approved piping connection six (6) feet 
(1,829 mm) or less in length between an existing 
gas outlet and a gas appliance in the same room 
with the outlet. 

1203.5 Gas-Piping System - Any arrangement of 
I gas piping or regulators after the point of delivery 

and each arrangement of gas piping serving a 
building, structure, or premises, whether individu- 
ally metered or not. 

11203.6 Grounding Electrode - A device that estab- 
lishes an electrical connection to the earth. 

1203.7 Liquefied Petroleum Gas (LPG) Facilities - 

Liquefied petroleum gas (LPG) facilities means 
tanks, containers, container valves, regulating equip- 
ment, meters, and /or appurtenances for the storage 
and supply of liquefied petroleum gas for any 
building, structure, or premises. 

1203.8 Provision for Location of Point of Delivery - 

The location of the point of delivery shall be accept- 
able to the serving gas supplier. [NFPA 54:5.2] 

1203.9 Quick-Disconnect Device - A hand-oper- 
ated device that provides a means for connecting 
and disconnecting an appliance or an appliance 
connector to a gas supply and that is equipped with 
an automatic means to shut off the gas supply when 
the device is disconnected. 

1203.10 Service Piping - The piping and equip- 
ment between the street gas main and the gas piping 
system inlet that is installed by, and is under the 
control and maintenance of, the serving gas supplier. 

1203.11 Transition Gas Riser - Any listed or 
approved section or sections of pipe and fittings 
used to convey fuel gas and installed in a gas piping 
system for the purpose of providing a transition 
from below ground to above ground. 

1204.0 Inspection. 

1204.1 Upon completion of the installation, alter- 
ation, or repair of any gas piping, and prior to the 
use thereof, the Authority Having Jurisdiction shall 
be notified that such gas piping is ready for inspec- 
tion. 

1204.2 All excavations required for the installation 
of underground piping shall be kept open until such 
time as the piping has been inspected and approved. 
If any such piping is covered or concealed before 
such approval, it shall be exposed upon the direction 
of the Authority Having Jurisdiction. 



1204.3 The Authority Having Jurisdiction shall 
make the following inspections and either shall 
approve that portion of the work as completed or 
shall notify the permit holder wherein the same fails 
to comply with this code. 

1204.3.1 Rough Piping Inspection. This 
inspection shall be made after all gas piping 
authorized by the permit has been installed and 
before any such piping has been covered or 
concealed or any fixture or appliance has been 
attached thereto. This inspection shall include a 
determination that the gas-piping size, material, 
and installation meet the requirements of this 
code. 

1204.3.2 Final Piping Inspection. This inspec- 
tion shall be made after all piping authorized by 
the permit has been installed and after all 
portions thereof that are to be covered or 
concealed are so concealed and before any 
fixtures, appliance, or shutoff valve has been 
attached thereto. This inspection shall be in 
accordance with Section 1214.1. Test gauges 
used in conducting tests shall comply with 
Section 319.0, Test Gauges. 

1204.4 In cases where the work authorized by the 
permit consists of a minor installation of additional 
piping to piping already connected to a gas meter, 
the foregoing inspections shall be permitted to be 
waived at the discretion of the Authority Having 
Jurisdiction. In this event, the Authority Having 
Jurisdiction shall make such inspection as deemed 
advisable in order to be assured that the work has 
been performed in accordance with the intent of this 
code. 

1205.0 Certificate of Inspection. 

1205.1 If, upon final piping inspection, the installa- 
tion is found to comply with the provisions of this 
code, a certificate of inspection shall be permitted to 
be issued by the Authority Having Jurisdiction. 

1 205.2 A copy of the certificate of such final piping 
inspection shall be issued to the serving gas supplier 
supplying gas to the premises. 

1205.3 It shall be unlawful for any serving gas 
supplier, or person furnishing gas, to turn on or 
cause to be turned on, any fuel gas or any gas meter 
or meters, until such certificate of final inspection, as 
herein provided, has been issued. 

1206.0 Authority to Render Gas Service. 

1206.1 It shall be unlawful for any person, firm, or 
corporation, excepting an authorized agent or 



168 



FUEL PIPING 



1206.1 -1209.4 



employee of a person, firm, or corporation engaged 
in the business of furnishing or supplying gas and 
whose service pipes supply or connect with the 
particular premises, to turn on or reconnect gas 
service in or on any premises where and when gas 
service is, at the time, not being rendered. 

1206.2 It shall be unlawful to turn on or connect gas 
in or on any premises unless all outlets are properly 
and securely connected to gas appliances or capped 
or plugged with screw joint fittings. 

1 207.0 Authority to Disconnect. 

1207.1 The Authority Having Jurisdiction or the 
serving gas supplier is hereby authorized to discon- 
nect any gas piping or appliance or both that shall be 
found not to conform to the requirements of this 
code or that are found defective and in such condi- 
tion as to endanger life or property. 

1 207.2 Where such disconnection has been made, a 
notice shall be attached to such gas piping or appli- 
ance or both that shall state the same has been 
disconnected, together with the reasons thereof. 

1 207.3 It shall be unlawful to remove or disconnect 
any gas piping or gas appliance without capping or 
plugging with a screw joint fitting, the outlet from 
which said pipe or appliance was removed. Outlets 
to which gas appliances are not connected shall be 
left capped, gas-tight on any piping system that has 
been installed, altered, or repaired. 

Exception: When an approved listed quick- 
disconnect device is used. 



1208.0 Temporary Use of Gas. 

Where temporary use of gas is desired and the 
Authority Having Jurisdiction deems the use neces- 
sary, a permit shall be permitted to be issued for 
such use for a period of time not to exceed that 
designated by the Authority Having Jurisdiction, 
provided that such gas-piping system otherwise 
conforms to the requirements of this code regarding 
material, sizing, and safety. 

1209.0 Gas-Piping System Design, Materials, and 
Components. 

1209.1 Piping Plan. 

1209.1.1 Installation of Piping System. Where 
required by the Authority Having Jurisdiction, a 
piping sketch or plan shall be prepared before 
proceeding with the installation. This plan shall 
show the proposed location of piping, the size of 



different branches, the various load demands, 
and the location of the point of delivery. [NFPA | 
54:5.1.1] 

1209.1.2 Addition to Existing System. When 
an additional gas utilization appliance is being [ 
connected to a gas-piping system, the existing 
piping shall be checked to determine whether it 
has adequate capacity (see Section 1209.4.3). If 
inadequate, the existing system shall be enlarged 
as required, or separate gas piping of adequate 
capacity shall be provided. [NFPA 54:5.1.2] I 

1209.2 Provision for Location of Point of Delivery. 
The location of the point of delivery shall be accept- 
able to the serving gas supplier. [NFPA 54:5.2] | 

1209.3 Interconnections Between Gas-Piping 
Systems. [NFPA 54:5.3] I 

1209.3.1 Interconnections Supplying Sepa- 
rate Users. Where two (2) or more meters, or 
two (2) or more service regulators where meters 
are not provided, are located on the same 
premises and supply separate users, the gas- 
piping systems shall not be interconnected on 
the outlet side of the meters or service regula- 
tors. [NFPA 54:5.3.1] I 

1209.3.2 Interconnections for Standby Fuels. 

Where a supplementary gas for standby use is 
connected downstream from a meter or a service 
regulator where a meter is not provided, a 
device to prevent backflow shall be installed. A 
three-way valve installed to admit the standby 
supply and, at the same time, shut off the 
regular supply, shall be permitted to be used for 
this purpose. [NFPA 54:5.3.2] I 

1209.4 Sizing of Gas-Piping Systems. [NFPA 54:5.4] 

1209.4.1 General Considerations. Gas-piping 
systems shall be of such size and so installed as 
to provide a supply of gas sufficient to meet the 
maximum demand and supply gas to each 
appliance inlet at not less than the minimum 
supply pressure required by the appliance. 
[NFPA 54-09:5.4.1] 

1209.4.2 Maximum Gas Demand. The volume 
of gas to be provided (in cubic feet per hour) 
shall be determined directly from the manufac- 
turer's input ratings of the gas utilization appli- | 
ance served. Where the input rating is not indi- 
cated, the gas supplier, appliance manufacturer, 
or a qualified agency shall be contacted or the 
rating from Table 12-1 shall be used for esti- 
mating the volume of gas to be supplied. The 
total connected hourly load shall be used as the 
basis for piping sizing, assuming the appliance is | 
operating at full capacity simultaneously. [NFPA | 
54:5.4.2] 



169 



1209.4 -Table 12-1 



UNIFORM PLUMBING CODE 



Exception: Sizing shall be permitted to be 
based upon established load diversity 
| factors. [NFPA 54:5.4.2.2] 

1209.4.3 Sizing Methods. Gas piping shall be 
| sized in accordance with one of the following : 

(1) Pipe sizing tables or sizing equations in this 
chapter. 

(2) Other approved engineering methods accept- 
able to the Authority Having Jurisdiction. 

(3) Sizing tables included in a listed piping 
system manufacturer's installation instruc- 
tions. [NFPA 54:5.4.3] 

1209.4.4 Allowable Pressure Drop. The design 
pressure loss in any piping system under 
maximum probable flow conditions, from the 
point of delivery to the inlet connection of the 
appliance, shall be such that the supply pressure 
at the appliance exceeds or is equal to the 
minimum pressure required by the appliance. 
[NFPA 54-09:5.4.4] 

1209.5 Acceptable Piping Materials and Joining 
Methods. 

1209.5.1 General. 

1209.5.1.1 Acceptable Materials. Materials 
used for piping systems shall. comply with 
the requirements of this chapter or shall be 
acceptable to the Authority Having Jurisdic- 
tion. [NFPA 54:5.6.1.1] 

1209.5.1.2 Used Materials. Pipe, fittings, 
valves, or other materials shall not be used 
again unless they are free of foreign mate- 
rials and have been ascertained to be 
adequate for the service intended. [NFPA 
54:5.6.1.2] 

1209.5.1.3 Other Materials. Material not 
covered by the standards specifications listed 
herein shall be investigated and tested to 
determine that it is safe and suitable for the 
proposed service and, in addition, shall be 
recommended for that service by the manufac- 
turer and shall be acceptable to the Authority 
Having Jurisdiction. [NFPA 54:5.6.1.3] 

1209.5.2 Metallic Pipe. 

1209.5.2.1 Cast-iron pipe shall not be used. 
[NFPA 54:5.6.2.1] 

1209.5.2.2 Steel and wrought-iron pipe 
shall be not less than standard weight 
(Schedule 40) and shall comply with one of 
the following standards 

(1) ASME B36.10, Welded and Seamless 
Wrought-Steel Pipe 



TABLE 12-1 

Approximate Gas Input for Typical Appliances 

[NFPA 54: Table 5.4.2.1] 



Appliance 


Input Btu/h. 
(Approx.) 


Space Heating Units 




Warm air furnace 




Single family 


100,000 


Multifamily, per unit 


60,000 


Hydronic boiler 




Single family 


100,000 


Multifamily, per unit 


60,000 


Space-and Water-Heating Units 




Hydronic boiler 




Single family 


120,000 


Multifamily, per unit 


75,000 


Water-Heating Appliances 




Water heater, automatic 




storage 30 to 40 gal. tank 


35,000 


Water heater, automatic 




storage 50 gal. tank 


50,000 


Water heater, automatic instantaneous 




Capacity at 2 gal. /minute 


142,800 


Capacity at 4 gal. /minute 


285,000 


Capacity at 6 gal. /minute 


428,400 


Water heater, domestic, 




circulating or side-arm 


35,000 


Cooking Appliances 




Range, freestanding, 




domestic 


65,000 


Built-in oven or broiler unit, 




domestic 


25,000 


Built-in top unit, 




domestic 


40,000 


Other Appliances 




Refrigerator 


3,000 


Clothes dryer, Type 1 




(domestic) 


35,000 


Gas fireplace direct vent 


40,000 


Gas log 


80,000 


Barbecue 


40,000 


Gaslight 


2,500 



For SI units: 1 Btu per hour = 0.293 W 



170 



FUEL PIPING 



1209.5 



(2) ASTM A 53, Standard Specification for 
Pipe, Steel, Black and Hot-Dipped, Zinc- 
Coated Welded and Seamless 

(3) ASTM A 106, Standard Specification for 
Seamless Carbon Steel Pipe for High- 
Temperature Service [NFPA 54:5.6.2.2]: 

1209.5.2.3 Copper and brass pipe shall not 
be used if the gas contains more than an 
average of 0.3 grains of hydrogen sulfide per 
one-hundred (100) scf of gas (0.7 mg/100 L). 
[NFPA 54:5.6.2.3] 

Threaded copper, brass, or aluminum 
alloy pipe shall not be used with gases 
corrosive to such material. [NFPA 54:5.6.2.4] 

1209.5.2.4 Aluminum alloy pipe shall 
comply with ASTM B 241, Standard Specifica- 
tion for Aluminum- Alloy Seamless Pipe and 
Seamless Extruded Tube (except that the use 
of alloy 5456 is prohibited) and shall be 
marked at each end of each length indi- 
cating compliance. Aluminum alloy pipe 
shall be coated to protect against external 
corrosion where it is in contact with 
masonry, plaster, insulation or is subject to 
repeated wettings by such liquids as water, 
detergents, or sewage. [NFPA 54:5.6.2.5] 
Aluminum alloy pipe shall not be used in 
exterior locations or underground. [NFPA 
54:5.6.2.6] 

1209.5.3 Metallic Tubing. Seamless copper, 
aluminum alloy, or steel tubing shall not be used 
with gases corrosive to such material. [NFPA 

54:5.6.3] 

1209.5.3.1 Steel tubing shall comply with 
ASTM A 254, Standard Specification for Copper 
Brazed Steel Tubing. [NFPA 54-09:5.6.3.1] 

1209.5.3.2 Copper and brass tubing shall 
not be used if the gas contains more than an 
average of 0.3 grains of hydrogen sulfide per 
one-hundred (100) scf of gas (0.7 mg/100 L). 
Copper tubing shall comply with standard 
Type K or L of ASTM B 88, Standard Specifi- 
cation for Seamless Copper Water Tube, or 
ASTM B 280, Specification for Seamless Copper 
Tube for Air -Conditioning and Refrigeration 
Field Service. [NFPA 54:5.6.3.2] 

1209.5.3.3 Aluminum alloy tubing shall 
comply with ASTM B 210, Standard Specifica- 
tion for Aluminum-Alloy Drawn Seamless 
Tubes, or ASTM B 241, Standard Specification 
for Aluminum Alloy Seamless Pipe and Seam- 
less Extruded Tube. Aluminum alloy tubing 



shall be coated to protect against external 
corrosion where it is in contact with 
masonry, plaster, insulation or is subject to 
repeated wettings by liquids such as water, 
detergent, or sewage. Aluminum alloy 
tubing shall not be used in exterior locations 
or underground. [NFPA 54:5.6.3.3] 

1209.5.3.4 Corrugated stainless steel tubing 
shall be tested and listed in compliance with 
the construction, installation, and perfor- 
mance requirements of CSA LC-1, Standard 
for Fuel Gas Piping Systems Using Corrugated 
Stainless Steel Tubing. [NFPA 54:5.6.3.4] 

1209.5.4 Plastic Pipe, Tubing, and Fittings. 

Plastic pipe, tubing, and fittings used to supply 
fuel gas shall conform with ASTM D 2513, Stan- 
dard Specification for Thermoplastic Gas Pressure 
Pipe, Tubing, and Fittings. Pipe to be used shall be 
marked "gas" and "ASTM D 2513." [NFPA 
54:5.6.4.1] 

Anodeless risers shall comply with the 
following [NFPA 54:5.6.4.3]: 

1209.5.4.1 Regulator Vent Piping. Plastic 
pipe, tubing, and fittings used to connect 
regulator vents to remote vent terminations 
shall be PVC conforming to UL 651, Schedule 
40 and 80 Rigid PVC Conduit and Fittings. 
PVC vent piping shall not be installed 
indoors. [NFPA 54-09:5.6.4.2] 

1209.5.4.2 Factory-assembled anodeless 
risers shall be recommended by the manu- 
facturer for the gas used and shall be leak- 
tested by the manufacturer in accordance 
with written procedures. [NFPA 54:5.6.4.3(1)] 

1209.5.4.3 Service head adapters and field- 
assembled anodeless risers incorporating 
service head adapters shall be recom- 
mended by the manufacturer for the gas 
used by the manufacturer and shall be 
design-certified to meet the requirements of 
Category I of ASTM D 2513, Standard Specifi- 
cation for Thermostatic Gas Pressure Pipe, 
Tubing, and Fittings and the code of Federal 
Regulations, Title 49, Part 192.281(e). The 
manufacturer shall provide the user with 
qualified installation instructions as 
prescribed by the code of Federal Regula- 
tions, Title 49, Part 192.283(b). [NFPA 
54:5.6.4.3(2)] 

1209.5.4.4 The use of plastic pipe, tubing, 
and fittings in undiluted liquefied petroleum 
gas-piping systems shall be in accordance 
with NFPA 58, Liquefied Petroleum Gas Code. 
[NFPA 54:5.6.4.3(3)] 



171 



1209.5 



UNIFORM PLUMBING CODE 



1209.5.5 Workmanship and Defects. Gas pipe 
or tubing and fittings shall be clear and free from 
cutting burrs and defects in structure or 
threading, and shall be thoroughly brushed and 
chip and scale blown. Defects in pipe, tubing, 
and fittings shall not be repaired. Defective pipe, 
tubing, and fittings shall be replaced. [NFPA 
54:5.6.5] 

1209.5.6 Protective Coating. Where in contact 
with material or atmosphere exerting a corrosive 
action, metallic piping and fittings coated with a 
corrosion-resistant material shall be used. 
External or internal coatings or linings used on 
piping or components shall not be considered as 
adding strength. [NFPA 54:5.6.6] 

1209.5.7 Metallic Pipe Threads. 

(A) Specifications for Pipe Threads. Metallic 
pipe and fitting threads shall be taper pipe 
threads and shall comply with ASME 
Bl.20.1, Standard for Pipe Threads, General 
Purpose (Inch). [NFPA 54:5.6.7.1] 

(B) Damaged Threads. Pipe with threads that 
are stripped, chipped, corroded, or other- 
wise damaged shall not be used. Where a 
weld opens during the operation of cutting 
or threading, that portion of the pipe shall 
not be used. [NFPA 54:5.6.7.2] 

(C) Number of Threads. Field threading of 
metallic pipe shall be in accordance with 
Table 12-2. [NFPA 54:5.6.7.3] 

(D) Thread Compounds. Thread (joint) 
compounds (pipe dope) shall be resistant to 
the action of liquefied petroleum gas or to 
any other chemical constituents of the gases 
to be conducted through the piping. [NFPA 
54:5.6.7.4] 

TABLE 12-2 

Specifications for Threading Metallic Pipe 

[NFPA 54: Table 5.6.7.3] 

Iron Pipe Approximate Length of Approximate No. of 
Size (in.) Threaded Portion (in.) Threads to Be Cut 



1/2 


3/4 


10 


3/4 


. 3/4 


10 


1 


7/8 


10 


1-1/4 


1 


11 


1-1/2 


1 


11 


2 


1 


11 


2-1/2 


1-1/2 


12 


3 


1-1/2 


12 


4 ' 


1-5/8 


13 


For SI units, 1 in. 


= 25.4 mm. 





1209.5.8 Metallic Piping Joints and Fittings. 

The type of piping joint used shall be suitable for 
the pressure-temperature conditions and shall 
be selected giving consideration to joint tight- 
ness and mechanical strength under the service 
conditions. The joint shall be able to sustain the 
maximum end force due to the internal pressure 
and any additional forces due to temperature 
expansion or contraction, vibration, fatigue, or to 
the weight of the pipe and its contents. [NFPA 
54:5.6.8] 

1209.5.8.1 Pipe Joints. Pipe joints shall be 
threaded, flanged, brazed, or welded. 
Where nonferrous pipe is brazed, the 
brazing materials shall have a melting point 
in excess of 1,000°F (538°C). Brazing alloys 
shall not contain more than 0.05 percent 
phosphorus. [NFPA 54:5.6.8.1] 

1209.5.8.2 Tubing Joints. Tubing joints 
shall either be made with approved gas 
tubing fittings, be brazed with a material 
having a melting point in excess of 1 / 000°F 
(538°C), or made by press-connect fittings 
complying with CSA LC-4. Brazing alloys 
shall not contain more than 0.05 percent 
phosphorus. [NFPA 54:5.6.8.2] 

1209.5.8.3 Flared Joints. Flared joints shall 
be used only in systems constructed from 
nonferrous pipe and tubing where experi- 
ence or tests, have demonstrated that the 
joint is suitable for the conditions and where 
provisions are made in the design to prevent 
separation of the joints. [NFPA 54:5.6.8.3] 

1209.5.8.4 Metallic Fittings (Including 
Valves, Strainers, Filters). 

(1) Threaded fittings in sizes exceeding 
four (4) inches (100 mm) shall not be 
used unless acceptable to the Authority 
Having Jurisdiction. 

(2) Fittings used with steel or wrought-iron 
pipe shall be steel, brass, bronze, 
malleable iron, or cast-iron. 

(3) Fittings used with copper or brass pipe 
shall be copper, brass, or bronze. 

(4) Fittings used with aluminum alloy pipe 
shall be of aluminum alloy. 

(5) Cast-iron Fittings. 

(a) Flanges shall be permitted. 

(b) Bushings shall not be used. 

(c) Fittings shall not be used in systems 
containing flammable gas-air 
mixtures. 



172 



FUEL PIPING 



1209.5-1209.6 



(d) Fittings in sizes four (4) inches (100 
mm) and larger shall not be used 
indoors unless approved by the 
Authority Having Jurisdiction. 

(e) Fittings in sizes six (6) inches (150 
mm) and larger shall not be used 
unless approved by the Authority 
Having Jurisdiction. 

(6) Aluminum Alloy Fittings. Threads shall 
not form the joint seal. 

(7) Zinc-Aluminum Alloy Fittings. Fittings 
shall not be used in systems containing 
flammable gas-air mixtures. 

(8) Special Fittings. Fittings such as 
couplings; proprietary-type joints; 
saddle tees; gland-type compression 
fittings; and flared, flareless, or 
compression-type tubing fittings shall 
be (1) used within the fitting manufac- 
turers' pressure-temperature recom- 
mendations; (2) used within the service 
conditions anticipated with respect to 
vibration, fatigue, thermal expansion, or 
contraction; (3) installed or braced to 
prevent separation of the joint by gas 
pressure or external physical damage; 
and (4) acceptable to the Authority 
Having Jurisdiction. [NFPA 54:5.6.8.4] 

1209.5.9 Plastic Piping, Joints, and Fittings. 

Plastic pipe, tubing, and fittings shall be joined 
in accordance with the manufacturers' instruc- 
tions. The following shall be observed when 
making such joints [NFPA 54:5.6.9]: 

(A) The joint shall be designed and installed so 
that the longitudinal pullout resistance of 
the joint shall be equal to the tensile strength 
of the plastic piping material. [NFPA 
54:5.6.9(1)] 

(B) Heat-fusion joints shall be made in accor- 
dance with AWS B2.4 Specification for 
Welding Procedure and Performance Qualifica- 
tion for Thermoplastics. Joints shall be made 
with the joining method recommended by 
the pipe manufacturer. Heat-fusion fittings 
shall be marked "ASTM D 2513." [NFPA 
54:5.6.9(2)] 

(C) Where compression-type mechanical joints 
are used, the gasket material in the fitting 
shall be compatible with the plastic piping 
and with the gas distributed by the system. 
An internal tubular rigid stiffener shall be 
used in conjunction with the fitting. The 
stiffener shall be flush with the end of the 
pipe or tubing, shall extend not less than the 



outside end of the pipe or tubing and shall 
extend not less than to the outside end of the 
compression fitting when installed. The 
stiffener shall be free of rough or sharp 
edges and shall not be a forced fit in the 
plastic. Split tubular stiffeners shall not be 
used. [NFPA 54:5.6.9(3)] 

(D) Plastic piping joints and fittings for use in 
liquefied petroleum gas-piping systems 
shall be in accordance with NFPA 58, Lique- 
fied Petroleum Gas Code [NFPA 54:5.6.9(4)] 

1209.5.10 Flanges. Flanges shall comply with 
ASME B16.1, Standard for Cast-Iron Pipe Plunges 
and Plunged Fittings; ASME B16.20, Standard for 
Ring-Joint Gaskets and Grooves for Steel Pipe 
Flanges; or MSS SP-6, Standard Finishes for Contact 
Paces of Pipe Flanges and Connecting-End Flanges of 
Valves and Fittings. The pressure-temperature 
ratings shall equal or exceed that required by the 
application. [NFPA 54:5.6.10] 

(A) Flange Facings. Standard facings shall be 
permitted for use under this code. Where 
one-hundred and fifty (150) psi (1,090 kPa) 
steel flanges are bolted to Class 125 cast-iron 
flanges, the raised face on the steel flange 
shall be removed. [NFPA 54:5.6.10.1] 

(B) Lapped Flanges. Lapped flanges shall be 
used only above ground or in exposed loca- 
tions accessible for inspection. [NFPA 
54:5.6.10.2] 

1209.5.11 Flange Gaskets. The material for 
gaskets shall be capable of withstanding the 
design temperature and pressure of the piping 
system and the chemical constituents of the gas 
being conducted without change to its chemical 
and physical properties. The effects of fire expo- 
sure to the joint shall be considered in choosing 
the material. [NFPA 54:5.6.11] 

(1) Acceptable materials include the following 
[NFPA 54:5.6.11.1]: 

(a) Metal or metal-jacketed asbestos (plain 
or corrugated) 

(b) Asbestos 

(c) Aluminum "O" rings and spiral-wound 
metal gaskets 

(2) When a flanged joint is opened, the gasket 
shall be replaced. [NFPA 54:5.6.11.2] 

(3) Full-face gaskets shall be used with all 
bronze and cast-iron flanges. [NFPA 
54:5.6.11.3] 

1209.6 Gas Meters. 

1209.6.1 Capacity. Gas meters shall be selected 
for the maximum expected pressure and permis- 
sible pressure drop. [NFPA 54:5.7.1] 



173 



1209.6-1209.7 



UNIFORM PLUMBING CODE 



1209.6.2 Location. 

(A) Gas meters shall be located in ventilated 
spaces readily accessible for examination, 
reading, replacement, or necessary mainte- 
nance. [NFPA 54:5.7.2.1] 

(B) Gas meters shall not be placed where they 
will be subjected to damage, such as adja- 
cent to a driveway; under a fire escape; in 
public passages, halls, or coal bins; or where 
they will be subject to excessive corrosion or 
vibration. [NFPA 54:5.7.2.2] 

(C) Gas meters shall not be located where they 
will be subjected to extreme temperatures or 
sudden extreme changes in temperature. 
Meters shall not be located in areas where 
they are subjected to temperatures beyond 
those recommended by the manufacturer. 
[NFPA 54:5.7.2.4] 

1209.6.3 Supports. Gas meters shall be 
supported or connected to rigid piping so as not 
to exert a strain on the meters. Where flexible 
connectors are used to connect a gas meter to 
downstream piping at mobile homes in mobile 
home parks, the meter shall be supported by a 
post or bracket placed in a firm footing or by 
other means providing equivalent support. 
[NFPA 54:5.7.3] 

1209.6.4 Meter Protection. Meters shall be 
protected against overpressure, back-pressure, 
and vacuum where such conditions are antici- 
pated. [NFPA 54:5.7.4] 

1209.6.5 Identification. Gas piping at multiple 
meter installations shall be marked by a metal 
tag or other permanent means attached by the 
installing agency, designating the building or 
the part of the building being supplied. [NFPA 
54:5.7.5] 

1209.7 Gas Pressure Regulators. 

1209.7.1 Where Required. A line gas pressure 

| regulator or gas appliance pressure regulator, as 
applicable, shall be installed where the gas 
supply pressure exceeds that at which the 

| branch supply line or gas utilization appliance is 

designed to operate or varies beyond design 
pressure limits. [NFPA 54:5.8.1] 

1209.7.2 Listing. The line gas pressure regulator 
shall be listed in accordance with CSA Z21.80. 
[NFPA 54:5.8.2] 

1209.7.3 Location. The gas pressure regulator 
shall be accessible for servicing. [NFPA 54:5.8.3] 

1209.7.4 Regulator Protection. Pressure regu- 
lators shall be protected against physical 
damage. [NFPA 54:5.8.4] 



1209.7.5 Venting. 

(A) Line Gas Pressure Regulators. 

(1) An independent vent to the outside of 
the building, sized in accordance with 
the regulator manufacturer's instructions, 
shall be provided where the location of 
a regulator is such that a ruptured 
diaphragm will cause a hazard. Where 
there is more than one (1) regulator at a 
location, each regulator shall have a 
separate vent to the outside or, if 
approved by the Authority Having 
Jurisdiction, the vent lines shall be 
permitted to be manifolded in accor- 
dance with accepted engineering prac- 
tices to minimize back-pressure in the 
event of diaphragm failure. (See NFPA 
54:5.9.7 for information on properly 
locating the vent.) Materials for vent 
piping shall be in accordance with 
Section 1209.5. 

Exception: A regulator and vent 
limiting means combination listed 
as complying with CSA Z21.80, 
Standard for Line Pressure Regulators, 
shall be permitted to be used without 
a vent to the outdoors. 

(2) The vent shall be designed to prevent 
the entry of water, insects, or other 
foreign materials that could cause 
blockage, 

(3) At locations where regulators might be 
submerged during floods, a special anti- 
flood-type breather vent fitting shall be 
installed, or the vent line shall be 
extended above the height of the 
expected flood waters. 

(4) A regulator shall not be vented to the 
gas appliance flue or exhaust system. 
[NFPA 54:5.8.5.1] 

(B) Venting of Gas Appliance Pressure Regu- 
lators. Venting of gas appliance pressure 
regulators shall comply with the following 
requirements: 

(1) Gas appliance pressure regulators 
requiring access to the atmosphere for 
successful operation shall be equipped 
with vent piping leading outdoors or, if 
the regulator vent is an integral part of 
the appliance, into the combustion | 
chamber adjacent to a continuous pilot, 
unless constructed or equipped with a 
vent-limiting means to limit the escape 
of gas from the vent opening in the 
event of diaphragm failure. 



174 



FUEL PIPING 



1209.7-1209.11 



(2) Vent-limiting means shall be employed 
on listed gas appliance pressure regula- 
tors only. 

(3) In the case of vents leading outdoors, 
means shall be employed to prevent 
water from entering this piping and also 
to prevent blockage of vents by insects 
and foreign matter. 

(4) Under no circumstances shall a regu- 
lator be vented to the gas utilization 
appliance flue or exhaust system. 

(5) In the case of vents entering the 
combustion chamber, the vent shall be 
located so the escaping gas will be 
readily ignited by the pilot and the heat 
liberated thereby will not adversely 
affect the normal operation of the safety 
shutoff system. The terminus of the vent 
shall be securely held in a fixed position 
relative to the pilot. For manufactured 
gas, the need for a flame arrester in the 
vent piping shall be determined. 

(6) Vent lines from a gas appliance pres- 
sure regulator and bleed lines from a 
diaphragm-type valve shall not be 
connected to a common manifold termi- 
nating in a combustion chamber. 

Vent lines shall not terminate in posi- 
tive-pressure-type combustion cham- 
bers. [NFPA 54:9.1.19] 

(C) Discharge of Vents. 

(1) The discharge stacks, vents, or outlet 
parts of all pressure-relieving and pres- 
sure-limiting devices shall be located so 
that gas is safely discharged into the 
outside atmosphere. 

(2) Discharge stacks or vents shall be 
designed to prevent the entry of water, 
insects, or any other foreign material 
that could cause blockage. The discharge 
stack or vent line shall be not less than 
the same size as the outlet of the pres- 
sure-relieving device. [NFPA 54:5.9.7] 

1209.7.6 Bypass Piping. Valved and regulated 
bypasses shall be permitted to be placed around 
gas line pressure regulators where continuity of 
service is imperative. [NFPA 54:5.8.6] 

1209.7.7 Identification. Line pressure regulators 
at multiple regulator installations shall be 
marked by a metal tag or other permanent 
means designating the building or the part of the 
building being supplied. [NFPA 54:5.8.7] 

1209.8 Back-Pressure Protection. 

1209.8.1 Where to Install. Protective devices 
shall be installed as close to the utilization 



appliance as practical, where the design of 
utilization appliances connected are such that | 
air, oxygen, or standby gases could be forced 
into the gas supply system. [NFPA 54:5.10.1.1] 
Gas and air combustion mixers incorporating 
double diaphragm "zero" or "atmosphere" 
governors or regulators shall require no further 
protection unless connected directly to 
compressed air or oxygen at pressures of five 
(5) psi (34 kPa) or more. [NFPA 54:5.10.1.2] 

1209.8.2 Protective Devices. Protective devices 
shall include but not be limited to the following: 

(1) Check valves 

(2) Three-way valves (of the type that 
completely closes one side before starting to 
open the other side) 

(3) Reverse flow indicators controlling positive 
shutoff valves 

(4) Normally closed air-actuated positive 
shutoff pressure regulators [NFPA 54:5.10.2] 

1209.9 Low-Pressure Protection. A protective 
device shall be installed between the meter and the 
gas utilization appliance if the operation of the appli- | 
ance (i.e., gas compressors) is such that it could 
produce a vacuum or a dangerous reduction in gas 
pressure at the meter. Such devices include, but are 
not limited to, mechanical, diaphragm-operated, or 
electrically operated low-pressure shutoff valves. 
[NFPA 54:5.11] 

1209.10 Shutoff Valves. Shutoff valves shall be 
approved and shall be selected giving consideration 
to pressure drop, service involved, emergency use, 
and reliability of operation. Shutoff valves of size one 
(1) inch (25 mm) National Pipe Thread and smaller 
shall be listed. [NFPA 54:5.12] 

1209.11 Expansion and Flexibility. 

1209.11.1 Design. Piping systems shall be 
designed to have sufficient flexibility to prevent 
thermal expansion or contraction from causing 
excessive stresses in the piping material, exces- 
sive bending or loads at joints, or undesirable 
forces or moments at points of connections to 
equipment and at anchorage or guide points. 
Formal calculations or model tests shall be 
required only where reasonable doubt exists as 
to the adequate flexibility of the system. [NFPA 
54:5.13.1] 

Flexibility shall be provided by the use of 
bends, loops, offsets, or couplings of the slip 
type. Provision shall be made to absorb thermal 
changes by the use of expansion joints of the 
bellows type, or by the use of "ball" or "swivel" 
joints. Expansion joints of the slip type shall not 
be used inside buildings or for thermal expan- 



175 



1209.11 -1211.1 



UNIFORM PLUMBING CODE 



sion. Where expansion joints are used, anchors 
or ties of sufficient strength and rigidity shall be 
installed to provide for end forces due to fluid 
pressure and other causes. [NFPA 54:5.13.1.1] 

Pipe alignment guides shall be used with 
expansion joints according to the recommended 
practice of the joint manufacturer. [NFPA 
54:5.13.1.2] 

1209.11.2 Special Local Conditions. Where 
local conditions include earthquake, tornado, 
unstable ground, or flood hazards, special 
consideration shall be given to increased 
strength and flexibility of piping supports and 
connections. [NFPA 54:5.13.2] 

1 21 0.0 Excess Flow Valve. 

Where automatic excess flow gas valves are installed, 
they shall be listed, sized, and installed in accor- 
dance with the manufacturer's instructions. [NFPA 
54-09:5.13] 

1211.0 Gas Piping Installation. 

1211.1 Piping Underground. 

1211.1.1 Clearances. Underground gas piping 
shall be installed with sufficient clearance from 
any other underground structure to avoid 
contact therewith, to allow maintenance, and to 
protect against damage from proximity to other 
structures. In addition, underground plastic 
piping shall be installed with sufficient clearance 
or shall be insulated from any source of heat so 
as to prevent the heat from impairing the 
serviceability of the pipe. [NFPA 54:7.1.1] 

1211.1.2 Protection Against Damage. 

(A) Cover Requirements. Underground piping 
systems shall be installed with a minimum 
of eighteen (18) inches (460 mm) of cover. 
Where external damage to the pipe is not 
likely to result, the cover shall be a 
minimum of twelve (12) inches (300 mm). 
Where a minimum of twelve (12) inches (300 
mm) of cover cannot be provided, the pipe 
shall be installed in conduit or bridged 
(shielded). [NFPA 54:7.1.2.1] 

(B) Trenches. The trench shall be graded so 
that the pipe has a firm, substantially 
continuous bearing on the bottom of the 
trench. [NFPA 54:7.1.2.2] 

(C) Backfilling. Where flooding of the trench is 
done to consolidate the backfill, care shall be 
exercised to see that the pipe is not floated 
from its firm bearing on the trench bottom. 
[NFPA 54:7.1.2.3] 



1211.1.3 Protection Against Corrosion. Gas 

piping in contact with earth or other material 
that could corrode the piping shall be protected 
against corrosion in an approved manner. When 
dissimilar metals are joined underground, an 
insulating coupling or fitting shall be used. 
Piping shall not be laid in contact with cinders. 
Uncoated threaded or socket-welded joints shall 
not be used in piping in contact with soil or 
where internal or external crevice corrosion is 
known to occur. [NFPA 54:7.1.3] 

1211.1.4 Protection Against Freezing. Where 
the formation of hydrates or ice is known to 
occur, piping shall be protected against freezing. 
[NFPA 54:7.1.4] 

1211.1.5 Piping Through Foundation Wall. 

Underground piping installed through the outer 
foundation or basement wall of a building, shall 
be encased in a protective sleeve or protected by 
an approved device or method. The space 
between the gas piping and the building or 
sleeve shall be sealed to prevent entry of gas and 
water. [NFPA 54:7.1.5] 

1211.1.6 Piping Underground Beneath Build- 
ings. Where the installation of gas piping under- 
ground beneath buildings is unavoidable, the 
piping shall be encased in an approved conduit 
designed to withstand the superimposed loads. 
[NFPA 54:7.1.6] The conduit shall extend into a 
normally usable and accessible portion of the 
building and, at the point where the conduit 
terminates in the building, the space between the 
conduit and the gas piping shall be sealed to 
prevent the possible entrance of any gas leakage. 
Where the end sealing is of a type that will retain 
the full pressure of the pipe, the conduit shall be 
designed for the same pressure as the pipe. The 
conduit shall extend not less than (4) inches (100 
mm) outside the building, be vented above grade 
to the outside, and be installed so as to prevent the 
entrance of water and insects. [NFPA 54:7.1.6.1] 

1211.1.7 Plastic Pipe. 

(A) Connection of Plastic Piping. Plastic pipe 
shall be installed outside, underground 
only. [NFPA 54:7.1.7.1] 

Exception No. 1: Plastic pipe shall be 
permitted to terminate above ground 
where an anodeless riser is used. 
Exception No. 2: Plastic pipe shall be 
permitted to terminate with a wall head 
adapter above ground in buildings, 
including basements, where the plastic 
pipe is inserted in a piping material 
permitted for use in buildings. 



176 



FUEL PIPING 



1211.1 -1211.2 



(B) Connections Between Metallic and 
Plastic Piping. Connections made between 
metallic and plastic piping shall be made 
only with fittings conforming to one of the 
following: 

(1) ASTM D2513, Standard Specification for 

Thermoplastic Gas Pressure Pipe, Tubing, 
and Fittings, Category I transition fittings. 

(2) ASTM F1973, Standard Specification for 

Factory Assembled Anodeless Risers and 
Transition Fittings in Polyethylene (PE) 
and Poly amide 11 (PAH) Fuel Gas Distri- 
bution Systems. 

(3) ASTM F2509, Standard Specification for 

Field-Assembled Anodeless Riser Kits for 
Use on Outside Diameter Controlled 
Polyethylene Gas Distribution Pipe and 
Tubing. [NFPA 54-09:7.17.2] 

(C) An electrically continuous corrosion-resis- 
tant tracer wire (minimum AWG 14) or tape 
shall be buried with the plastic pipe to facili- 
tate locating. One (1) end shall be brought 
above ground at a building wall or riser. 
[NFPA 54:7.1.7.3] 

1211.2 Installation of Piping. 

1211.2.1 Piping installed above ground shall be 
securely supported and located where it will be 
protected from physical damage (also see 
1211.1.4). Where passing through an outside 
wall, the piping shall also be protected against 
corrosion by coating or wrapping with an inert 
material approved for such applications. Where 
piping is encased in a protective pipe sleeve, the 
annular space between the gas piping and the 
sleeve shall be sealed at the wall to prevent the 
entry of water, insects, or rodents. [NFPA 
54:7.2.1] 

1211.2.2 Building Structure. 

(1) The installation of gas piping shall not cause 
structural stresses within building compo- 
nents to exceed allowable design limits. 
[NFPA 54:7.2.2.1] 

(2) Approval shall be obtained before any 
beams or joists are cut or notched. [NFPA 
54:7.2.2.2] Permission shall be obtained from 
the Authority Having Jurisdiction. 

1211.2.3 Other than Dry Gas. Drips, sloping, 
protection from freezing, and branch pipe 
connections, as provided for in Section 1211.1.4, 
1211.8.1, and Section 1211.10, shall be provided 
when other than dry gas is distributed and 
climactic conditions make such provisions neces- 
sary. [NFPA 54:7.2.3] 



1211.2.4 Gas Piping to be Sloped. Piping for 
other than dry gas conditions shall be sloped not 
less than one-fourth (1/4) inch in fifteen (15) feet 
(8 mm in 4,572 mm) to prevent traps. [NFPA 
54:7.2.4] 

1211.2.4.1 Ceiling Locations. Gas piping 
shall be permitted to be installed in acces- 
sible spaces between a fixed ceiling and a 
dropped ceiling, whether or not such spaces 
are used as a plenum. Valves shall not be 
located in such spaces. 

Exception: Appliance shutoff valves | 
required by this code shall be permitted 
to be installed in accessible spaces 
containing vented gas utilization appli- 
ances. 

1211.2.5 Prohibited Locations. Gas piping 
inside any building shall not be installed in or 
through a circulating air duct, clothes chute, 
chimney or gas vent, ventilating duct, dumb- 
waiter, or elevator shaft. [NFPA 54:7.2.5] This 
provision shall not apply to ducts used to 
provide combustion and ventilation air in accor- 
dance with Section 507.0 or to above-ceiling 
spaces as covered in Section 1211.2.4.1. 

1211.2.6 Hangers, Supports, and Anchors. 

(A) Piping shall be supported with metal pipe 
hooks, metal pipe straps, metal bands, metal 
brackets, metal hangers, or building struc- 
tural components, suitable for the size of 
piping, of adequate strength and quality; 
and located at intervals so as to prevent or 
damp out excessive vibration. Piping shall 
be anchored to prevent undue strains on 
connected equipment and shall not be 
supported by other piping. Pipe hangers 
and supports shall conform to the require- 
ments of MSS SP-58, Pipe Hangers and 
Supports Materials, Design and Manufacture. 
[NFPA 54:7.2.6.1] 

(B) Spacings of supports in gas-piping installa- 
tions shall not exceed as shown in Table 12- 
3. Spacing of supports for CSST shall be in 
accordance with the CSST manufacturer's 
instruction. [NFPA 54:7.2.6.2] 

(C) Supports, hangers, and anchors shall be 
installed so as not to interfere with the free 
expansion and contraction of the piping 
between anchors. All parts of the supporting 
equipment shall be designed and installed 
so they will not be disengaged by move- 
ment of the supported piping. [NFPA 
54:7.2.6.3] 



177 



Table 12-3 -1211 .5 



UNIFORM PLUMBING CODE 



TABLE 12-3 
Support of Piping 



, Nominal Size - 

Spacing of ofTub Spacing of 

Sup P° rts Smooth-wall Su PP orts 
(fL) (In. O.D.) (ft -> 



Steel Pipe, 

Nominal Size 

of Pipe (in.) 



1/2 


6 


1/2 


4 


3/4 or 1 


8 


5/8 or 3/4 


6 


1-1/4 or larger 


10 


7/8 or 1 


8 


(horizontal) 




(horizontal) 




1-1/4 or larger 


every floor 


1 or larger 


every floor 


(vertical) 


level 


(vertical) 


level 


For SI units: 1 ft. = 


= 0.305 m. [NFP 


'A 54: Table 7.2.6. 


2] 



1211.2.7 Removal of Pipe. Where piping 
containing gas is to be removed, the line shall be 
first disconnected from sources of gas and then 
thoroughly purged with air, water, or inert gas 
before any cutting or welding is done. (See 
Section 1214.6.) [NFPA 54:7.2.7] 

1 21 1 .3 Concealed Piping in Buildings. 

1211.3.1 General. Gas piping in concealed loca- 
tions shall be installed in accordance with this 
section. [NFPA 54:7.3.1] 

1211.3.2 Connections. Where gas piping is to 
be concealed, unions, tubing fittings, right and 
left couplings, bushings, swing joints, and 
compression couplings made by combinations of 
fittings shall not be used. Connections shall be of 
the following type: 

(1) Pipe fittings such as elbows, tees, and 
couplings. 

(2) Joining tubing by brazing (see Section 
1209.5.8.2). 

(3) Fittings listed for use in concealed spaces 
that have been demonstrated to sustain, 
without leakage, any forces due to tempera- 
ture expansion or contraction, vibration, or 
fatigue based on their geographic location, 
application, or operation. 

(4) Where necessary to insert fittings in gas pipe 
that has been installed in a concealed loca- 
tion, the pipe shall be reconnected by 
welding, flanges, or the use of a ground joint 
union with the nut center-punched to 
prevent loosening by vibration. [NFPA 
54:7.3.2] 

1211.3.3 Piping in Partitions. Concealed gas 
piping shall not be located in solid partitions. 
[NFPA 54:7.3.3] 

1211.3.4 Tubing in Partitions. This provision 
shall not apply to tubing that pierces walls, 
floors, or partitions or to tubing installed verti- 
cally and horizontally inside hollow walls or 



partitions without protection along its entire 
concealed length where both of the following 
requirements are met: 

(1) A steel striker barrier not less than 0.0508 
inches (1.3 mm) thick, or equivalent, is 
installed between the tubing, the finished 
wall and extends at least 4 inches (100 mm) 
beyond concealed penetrations of plates, fire 
stops, wall studs, and so on. 

(2) The tubing is installed in single runs and is 
not rigidly secured. [NFPA 54:7.3.4] 

1211.3.5 Piping in Floors. In industrial occu- 
pancies, gas piping in solid floors such as 
concrete shall be laid in channels in the floor and 
covered to permit access to the piping with 
minimum damage to the building. Where piping 
in floor channels could be exposed to excessive 
moisture or corrosive substances, the piping 
shall be protected in an approved manner. 
[NFPA 54:7.3.5.1] 

Exception: In other than industrial occupan- 
cies and where approved by the Authority 
Having Jurisdiction, gas piping embedded 
in concrete floor slabs constructed with port- 
land cement shall be surrounded with a 
minimum of one and one half (1-1/2) inches 
(38 mm) of concrete and shall not be in 
physical contact with other metallic struc- 
tures such as reinforcing rods or electrically 
neutral conductors. Piping, fittings, and 
risers shall be protected against corrosion in 
accordance with Section 1209.5.6. Piping 
shall not be embedded in concrete slabs 
containing quick-set additives or cinder 
aggregate. [NFPA 54:7.3.5.2] 

1211.4 Piping in Vertical Chases. (See Section 
1202.0.) Where gas piping exceeding five (5) psi (34 
kPa) is located within vertical chases in accordance 
with Section 1211.5, the requirements of Sections 
1211.5.1 through 1211.5.3 shall apply. [NFPA 54:7.4] 

1211.5 Maximum Design Operating Pressure. The 

maximum design operating pressure for piping 
systems located inside buildings shall not exceed five 
(5) psi (34 kPa) unless one (1) or more of the 
following conditions are met: 

(1) The piping system is welded. 

(2) The piping is located in a ventilated chase or 
otherwise enclosed for protection against acci- 
dental gas accumulation. 

(3) The piping is located inside buildings or sepa- 
rate areas of buildings used exclusively for one 
of the following: 



178 



FUEL PIPING 



1211.5-1211.7 



(a) Industrial processing or heating 

(b) Research 

(c) Warehousing 

(d) Boiler or mechanical equipment rooms 

(4) The piping is a temporary installation for build- 
ings under construction. 

(5) The piping serves appliances or equipment used 
for agricultural purposes. 

(6) The piping system is an LP-Gas piping system 
with a design operating pressure greater than 20 
psi and complies with NFPA 54:5.5.2. Liquefied 
Petroleum Gas Systems designed to operate 
below -5°F (~21°C) with butane or a propane- 
butane mix shall be designed to either accommo- 
date liquid LP-Gas or to prevent LP-Gas vapor 
from condensing back into liquid. [NFPA 54- 
09:5.5.1] 

1211.5.1 Pressure Reduction. (See Section 
1202.0.) Where pressure reduction is required in 
branch connections for compliance with Section 
1211.5, such reduction shall take place either 
inside the chase or immediately adjacent to the 
outside wall of the chase. Regulator venting and 
downstream overpressure protection shall comply 
with Section 1209.7.4 and NFPA Section 5.9. The 
regulator shall be accessible for service and repair 
and vented in accordance with one (1) of the 
following: 

(1) Where the fuel gas is lighter than air, regula- 
tors equipped with a vent-limiting means 
shall be permitted to be vented into the 
chase. Regulators not equipped with a vent- 
limiting means shall be permitted to be 
vented either directly to the outdoors or to a 
point within the top one (1) foot (0.3 m) of the 
chase. 

(2) Where the fuel gas is heavier than air, the 
regulator vent shall be vented only directly 
to the outdoors. [NFPA 54:7.4.1] 

1211.5.2 Liquefied Petroleum Gas Systems. 

The maximum operating pressure of LP-Gas 
piping systems shall be: 

(1) In accordance with Section 1211.5.1; 

(2) In accordance with NFPA 58, where the 
pressure exceeds twenty (20) psi (138 kPa) 
and; 

(3) Designed to either accommodate liquid LP- 
Gas or prevent LP-Gas vapor from condensing 
back into a liquid in buildings having systems 
designed to operate below -5°F (-21°C) or with 
butane or a propane-butane mix. 



1211.5.3 Construction. Chase construction 
shall comply with local building codes with 
respect to fire resistance and protection of hori- 
zontal and vertical openings. [NFPA 54:7.4.2] 

1211.5.4 Ventilation. A chase shall be ventilated 
to the outdoors and only at the top. The open- 
ings shall have a minimum free area (in square 
inches) equal to the product of one-half (1/2) of 
the maximum pressure in the piping (in psi) 
times the largest nominal diameter of that piping 
(in inches), or the cross-sectional area of the 
chase, whichever is smaller. Where more than 
one (1) fuel gas piping system is present, the free 
area for each system shall be calculated and the 
largest area used. [NFPA 54:7.4.3] 

1211.6 Appliance Over Pressure Protection. The 

maximum operating pressure for piping systems 
serving appliances designed to operate at fourteen 
(14) inches w.c. inlet pressure or less shall be two (2) 
psig unless an over-pressure protection device 
designed to limit pressure at the appliance to two (2) 
psig upon failure of the line gas pressure regulator is 
installed. 

1211.7 Gas Pipe Turns. Changes in direction of gas 
pipe shall be made by the use of fittings, or factory 
bends. [NFPA 54:7.5] 

1211.7.1 Metallic Pipe. Metallic pipe bends 
shall comply with the following: 

(1) Bends shall be made only with bending 
equipment and procedures intended for that 
purpose. 

(2) Bends shall be smooth and free from buck- 
ling, cracks, or other evidence of mechanical 
damage. 

(3) The longitudinal weld of the pipe shall be 
near the neutral axis of the bend. 

(4) The pipe shall not be bent through an arc of 
more than 90 degrees. 

(5) The inside radius of a bend shall be not less 
than six (6) times the outside diameter of the 
pipe. [NFPA 54:7.5.1] 

1211.7.2 Plastic Pipe. Plastic pipe bends shall 
comply with the following: 

(1) The pipe shall not be damaged and the 
internal diameter of the pipe shall not be 
effectively reduced. 

(2) Joints shall not be located in pipe bends. 

(3) The radius of the inner curve of such bends 
shall be not less than twenty-five (25) times 
the inside diameter of the pipe. 

(4) Where the piping manufacturer specifies the 
use of special bending equipment or proce- 
dures, such equipment or procedures shall 
be used. [NFPA 54:7.5.2] 



179 



1211.7-1211.11 



UNIFORM PLUMBING CODE 



1211.7.3 Elbows. Factory-made welding elbows 
or transverse segments cut therefrom shall have 
an arc length measured along the crotch of at 
least one (1) inch (25 mm) for pipe sizes two (2) 
inches and larger. [NFPA 54:7.5.3] 

1211.8 Drips and Sediment Traps. 

1211.8.1 Provide Drips Where Necessary. For 

other than dry gas conditions, a drip shall be 
provided at any point in the line of pipe where 
condensate could collect. Where required by the 
Authority Having Jurisdiction or the serving gas 
supplier, a drip shall also be provided at the 
outlet of the meter. This drip shall be so installed 
as to constitute a trap wherein an accumulation 
of condensate will shut off the flow of gas before 
it will run back into the meter. [NFPA 54:7.6.1] 

1211.8.2 Location of Drips. Drips shall be 
installed only in such locations that they will be 
readily accessible to permit cleaning or 
emptying. A drip shall not be located where the 
condensate is likely to freeze. [NFPA 54:7.6.2] 

1211.8.3 Sediment Traps. (See Section 1212.7.) 

1211.9 Outlets. 

1211.9.1 Location and Installation. 

(1) The outlet fittings or piping shall be securely 
fastened in place. [NFPA 54:7.7.1.1] 

(2) Outlets shall not be located behind doors. 
[NFPA 54:7.7.1.2] 

(3) Outlets shall be located far enough from 
floors, walls, patios, slabs, and ceilings to 
permit the use of wrenches without 
straining, bending, or damaging the piping. 
[NFPA 54:7.7.1.3] 

(4) The unthreaded portion of gas piping 
outlets shall extend not less than one (1) 
inch (25 mm) through finished ceilings or 
indoor or outdoor walls. [NFPA 54:7.7.1.4] 

(5) The unthreaded portion of gas-piping 
outlets shall extend not less than two (2 ) 
inches (50 mm) above the surface of floors 
or outdoor patios or slabs. [NFPA 54:7.7.1.5] 

(6) The provisions of Sections 1211.7.1(4) and 
(5) shall not apply to listed quick-disconnect 
devices of the flush-mounted type or listed 
gas convenience outlets. Such devices shall 
be installed in accordance with the manufac- 
turer' s installation instructions. [NFPA 
54:7.7.1.6] 

1211.9.2 Cap Outlets. 

(A) Each outlet, including a valve, shall be 

closed gas-tight with a threaded plug or cap 

immediately after installation and shall be 

l left closed until the gas utilization appliance 



is connected thereto. When an appliance is | 
disconnected from an outlet and the outlet is 
not to be used again immediately, it shall be 
closed gas-tight. [NFPA 54:7.7.2.1] 

Exception No. 1: Laboratory equipment 
installed in accordance with 1212.2(A) 
shall be permitted. 

Exception No. 2: The use of a listed 
quick-disconnect device with integral 
shutoff or listed gas convenience outlet 
shall be permitted. 

(B) Appliance shutoff valves installed in fire- 
places shall be removed and the piping 
capped gas-tight where the fireplace is used 
for solid-fuel burning. [NFPA 54:7.7.2.2] 

1211.10 Branch Pipe Connection. When a branch 
outlet is placed on a main supply line before it is 
known what size pipe will be connected to it, the 
outlet shall be of the same size as the line that 
supplies it. [NFPA 54:7.8] 

1211.11 Manual Gas Shutoff Valves. (Also see 
Section 1212.5) 

1211.11.1 Valves at Regulators. An accessible 
gas shutoff valve shall be provided upstream of 
each gas pressure regulator. Where two (2) gas 
pressure regulators are installed in series in a 
single gas line, a manual valve shall not be 
required at the second regulator. [NFPA 54:7.9.1] 

1211.11.2 Valves Controlling Multiple 
Systems. 

(A) Accessibility of Gas Valves. Main gas 
shutoff valves controlling several gas piping 
systems shall be readily accessible for opera- 
tion and installed so as to be protected from 
physical damage. They shall be marked with 
a metal tag or other permanent means 
attached by the installing agency so that the 
gas piping systems supplied through them 
can be readily identified. [NFPA 54:7.9.2.1] 

(B) Shutoff Valves for Multiple House Lines. 

In multiple-tenant buildings supplied 
through a master meter, or through one (1) 
service regulator where a meter is not 
provided, or where meters or service regula- 
tors are not readily accessible from the 
equipment location/ an individual shutoff 
valve for each apartment or tenant line shall 
be provided at a convenient point of general 
accessibility. 

In a common system serving a number 
of individual buildings, shutoff valves shall 
be installed at each building. [NFPA 
54:7.9.2.2] 



180 



FUEL PIPING 



1211.11 -1212.1 



1211.11.3 Emergency Shutoff Valves. An exte- 
rior shutoff valve to permit turning off the gas 
supply to each building in an emergency shall be 
provided. The emergency shutoff valves shall be 
plainly marked as such and their locations 
posted as required by the Authority Having 
Jurisdiction. [NFPA 54:7.9.2.3] 

1211.11.4 Shutoff Valve For Laboratories. 

Each laboratory space containing two (2) or 
more gas outlets installed on tables, benches, or 
in hoods in educational, research, commercial 
and industrial occupancies shall have a single 
shutoff valve through which such gas outlets are 
supplied. The shutoff valve shall be accessible 
and shall be located within the laboratory or 
located adjacent to the laboratory's egress door 
and shall be identified. [NFPA 54-09:7.9.2.4] 

1211.12 Prohibited Devices. No device shall be 
placed inside the gas piping or fittings that will 
reduce the cross-sectional area or otherwise obstruct 
the free flow of gas, except where proper allowance 
in the piping system design has been made for such 
a device and where approved by the Authority 
Having Jurisdiction. [NFPA 54:7.10] 

1211.13 Systems Containing Gas-Air Mixtures 
Outside the Flammable Range. Where gas-air 
mixing machines are employed to produce mixtures 
above or below the flammable range, they shall be 
provided with stops to prevent adjustment of the 
mixture to within or approaching the flammable 
range. [NFPA 54:7.11] 

1211.14 Systems Containing Flammable Gas-Air 

■ Mixtures. Systems containing flammable gas-air 
mixtures shall be in accordance with NFPA 54. 

1211.15 Electrical Bonding and Grounding. 

| 1211.15.1 Pipe and Tubing other than CSST. 

Each above ground portion of a gas piping 
| system other than CSST that is likely to become 

energized shall be electrically continuous and 

bonded to an effective ground-fault current 
| path. Gas piping, other than CSST shall be 

considered to be bonded when it is connected to 
| appliances that are connected to the appliance 

grounding conductor of the circuit supplying 

that appliance. [NFPA 54-09:7.13.1] 

1211.15.2 CSST gas piping systems shall be 
bonded to the electrical service grounding elec- 
trode system at the point where the gas service 
enters the building. The bonding jumper shall be 
not smaller than six (6) AWG copper wire. 
[NFPA 54-09:7.13.2] 

1211.15.3 Gas piping shall not be used as a 
grounding conductor or electrode. This does not 
preclude the bonding of metallic piping to a 
grounding system. [NFPA 54-09:7.13.3] 



1211.15.4 Where a lightning protection system 
is installed, the bonding of the gas piping system 
shall be in accordance with NFPA 780, Standard 
for Installation of Lightning Protection Systems. 
[NFPA 54-09:7.13.4] ' 

1211.16 Electrical Circuits. Electrical circuits shall 
not utilize gas piping or components as conductors. 
[NFPA 54:7.14] 

Exception: Low-voltage (50V or less) control 
circuits, ignition circuits, and electronic flame 
detection device circuits shall be permitted to 
make use of piping or components as a part of 
an electric circuit. 

1211.17 Eiectrical Connections. 

(A) Electrical connections between wiring and 
electrically operated control devices in a 
piping system shall conform to the require- 
ments of NFPA 70, National Electrical Code. 
(See Section 1211.15) [NFPA 54:7.15.1] 

(B) Any essential safety control depending on 
electric current as the operating medium 
shall be of a type that will shut off (fail safe) 
the flow of gas in the event of current 
failure. [NFPA 54:7.15.2] 



1212.0 Appliance Connections to Building Piping. I 

1212.1 Connecting Gas Appliances. Gas utiliza- 1 
tion appliances shall be connected to the building | 
piping in compliance with Sections 1212.5 and 1212.6 
by one of the following [NFPA 54:9.6.1]: 

(1) Rigid metallic pipe and fittings. [NFPA 54:9.6.1(1)] 

(2) Semirigid metallic tubing and metallic fittings. 
Aluminum alloy tubing shall not be used in 
exterior locations. [NFPA 54:9.6.1(2)] 

(3) Listed flexible gas connectors in compliance with 
CSA Z21.24, Standard for Connectors for Gas Appli- 
ances. The connector shall be used in accordance 
with the terms of their listing that are completely 
in the same room as the appliance. [NFPA 
54:9.6.1(3)] 

(4) CSST where installed in accordance with the 
manufacturer's instructions. [NFPA 54:9.6.1(5)] 

(5) Listed nonmetallic gas hose connectors in accor- 
dance with 1212.3. [NFPA 54:9,6.1(6)] 

(6) Gas-fired food service (commercial cooking) 
appliances listed for use with casters or otherwise 
subject to movement for cleaning, and other large 
and heavy gas utilization appliances that can be 
moved, shall be connected in accordance with 
the connector manufacturer's installation 
instructions using a listed appliance connector 
complying with CSA Z21.69, Standard for Connec- 
tors for Movable Gas Appliances. The commercial 
cooking appliance connector installation shall be 
configured in accordance with the manufac- 
turer's installation instructions. (NFPA 54:9.6.1.1) 



181 



1212.1 -12127 



UNIFORM PLUMBING CODE 



(7) Movement of appliances with casters shall be 
limited by a restraining device installed in accor- 
dance with the connector and appliance manu- 
facturer's installation instructions. [NFPA 54- 
09:9.6.1.2] 

(8) In 1212.1(2), (3), and (5), the connector or tubing 
shall be installed so as to be protected against 
physical and thermal damage. Aluminum alloy 
tubing and connectors shall be coated to protect 
against external corrosion where they are in 
contact with masonry, plaster, insulation, or are 
subject to repeated wettings by such liquids as 
water (except rain water), detergents, or 
sewage.[NFPA 54:9.6.1(7)] 

1212.2 Suspended Low-Intensity Infrared Tube 
Heaters. Suspended low-intensity infrared tube 
heaters shall be connected to the building piping 
system with a connector listed for the application in 
accordance with CSA Z21.24/CGA 6.10, Connectors 
for Gas Appliances. [NFPA 54-09:9.6.1.3] 

(A) The connector shall be installed in accordance 
with the tube heater installation instructions, 
and shall be in the same room as the appliance. 

(B) Only one connector shall be used per appliance. 

1212.3 Use of Nonmetallic Gas Hose Connectors. 

Listed nonmetallic gas hose connectors shall be used 
in accordance with the terms of their listing and as 
follows [NFPA 54:9.6.2]: 

(A) Indoor. Indoor gas hose connectors shall be 
used only to connect laboratory, shop, and 
ironing equipment requiring mobility during 
operation. An equipment shutoff valve shall be 
installed where the connector is attached to the 
building piping. The connector shall be of 
minimum length and shall not exceed six (6) feet 
(1,829 mm). The connector shall not be concealed 
and shall not extend from one (1) room to 
another or pass through wall partitions, ceilings, 
or floors. 

(B) Outdoor. Outdoor gas hose connectors are 
permitted to connect portable outdoor gas-fired 

| appliances. An appliance shutoff valve, a listed 

quick-disconnect device, or a listed gas conve- 
nience outlet shall be installed where the 
connector is attached to the supply piping and in 
such a manner to prevent the accumulation of 
water or foreign matter. This connection shall be 
made only in the outdoor area where the appli- 
ance is to be used. The connector length shall not 
exceed fifteen (15) feet (4,572 mm). 

1212.4 Connection of Portable and Mobile Indus- 
trial Gas Appliance. 

1 (A) Where portable industrial gas utilization appli- 
I ances, or appliances requiring mobility or 



subject to vibration, are connected to the 
building gas piping system by the use of a flex- 
ible hose, the hose shall be suitable and safe for 
the conditions under which it can be used. 
[NFPA 54:9.6.3.1] 

(B) Where industrial gas utilization appliances I 
requiring mobility are connected to the rigid 
piping by the use of swivel joints or couplings, 
the swivel joints or couplings shall be suitable 
for the service required, and only the minimum 
number required shall be installed. [NFPA 
54:9.6.3.2] 

(C) Where industrial gas utilization appliances I 
subject to vibration are connected to the building 
piping system by the use of all-metal flexible 
connectors, the connectors shall be suitable for 
the service required. [NFPA 54:9.6.3.3] 

(D) Where flexible connections are used, they shall 
be of the minimum practical length and shall not 
extend from one (1) room to another or pass 
through any walls, partitions, ceilings, or floors. 
Flexible connections shall not be used in any 
concealed location. They shall be protected 
against physical or thermal damage and shall be 
provided with gas shutoff valves in readily 
accessible locations in rigid piping upstream 
from the flexible connections. [NFPA 54:9.6.3.4] 

1212.5 Appliance Shutoff Valves and Connec- 
tions. Gas utilization appliance connected to a 
piping system shall have an accessible, approved 
manual shutoff valve with a nondisplaceable valve 
member, or a listed gas convenience outlet installed 
within six (6) feet (1.8 m) of the appliance it serves. 
Where a connector is used, the valve shall be 
installed upstream of the connector. A union or 
flanged connection shall be provided downstream 
from this valve to permit removal of controls. 
Shutoff valves serving decorative gas appliances 
shall be permitted to be installed in fireplaces if 
listed for such use. [NFPA 54:9.6.4] 

1212.6 Quick-Disconnect Devices. Quick-disconnect 
devices used to connect appliances to the building 
piping shall be listed. Where they are installed 
indoors, an approved manual shutoff valve with a 
nondisplaceable valve member shall be installed 
upstream of the quick-disconnect device. [NFPA 
54:9.6.5] 

1212.7 Sediment Trap. Where a sediment trap is 
not incorporated as a part of the gas utilization appli- 
ance, a sediment trap shall be installed downstream 
of the appliance shutoff valve as close to the inlet of 
the appliance as practical at the time of appliance 
installation. The sediment trap shall be either a tee 
fitting with a capped nipple in the bottom outlet, as 



182 



FUEL PIPING 



1212.7-1214.2 



illustrated in Figure 12-1, or other device recognized 
as an effective sediment trap. Illuminating appli- 
ances, ranges, clothes dryers, decorative vented 
appliances for installation in vented fireplaces, gas 
fireplaces, and outdoor grills shall not be required to 
be so equipped. [NFPA 54-09:9.67] 



Gas supply iniet 



To 

equipment - 
inlet 



-Tee fitting 



Nipple ~ 



3 in. (80 mm) 
minimum 



cap-^ q-, _ .„.y-~— 

Figure 12-1 Method of Installing a Tee Fitting 
Sediment Trap. 

1212.8 Installation of Piping. Piping shall be 
installed in a manner not to interfere with inspection, 
maintenance, or servicing of the gas utilization 
equipment. [NFPA 54:9.6.8] 

1213.0 Liquefied Petroleum Gas Facilities and 
Piping. 

Liquefied petroleum gas facilities shall comply with 
NFPA 58, Liquefied Petroleum Gas Code. 

1214.0 Pressure Testing and Inspection. 

1214.1 General. 

1214.1.1 Prior to acceptance and initial opera- 
tion, piping installations shall be inspected and 
pressure-tested to determine that the materials, 
design, fabrication, and installation practices 
comply with the requirements of this code. 
[NFPA 54:8.1.1.1] 

1214.1.2 Inspection shall consist of visual exam- 
ination during or after manufacture, fabrication, 
assembly, or pressure tests, as appropriate. 
Supplementary types of non-destructive inspec- 
tion techniques, such as magnetic-particle, radio- 
graphic, and ultrasonic, shall not be required 
unless specifically listed herein or in the engi- 
neering design. [NFPA 54:8.1.1.2] 

1214.1.3 Where repairs or additions are made 
following the pressure test, the affected piping 
shall be tested. Minor repairs and additions are 
not required to be pressure-tested provided that 
the work is inspected and connections are tested 
with a noncorrosive leak-detecting fluid or other 
leak-detecting methods approved by the 
Authority Having Jurisdiction. [NFPA 54:8.1.1.3] 



1214.1.4 Where new branches are installed from 
the point of delivery to new appliances, only the 
newly installed branches shall be required to be 
pressure-tested. Connections between the new 
piping and the existing piping shall be tested 
with a noncorrosive leak-detecting fluid or 
approved leak-detecting methods. [NFPA 
54:8.1.1.4] 

1214.1.5 A piping system shall be tested as a 
complete unit or in sections. Under no circum- 
stances shall a valve in a line be used as a bulk- 
head between gas in one (1) section of the piping 
system and test medium in an adjacent section, 
unless two (2) valves are installed in series with 
a valved "telltale" located between these valves. 
A valve shall not be subjected to the test pres- 
sure unless it can be determined that the valve, 
including the valve-closing mechanism, is 
designed to safely withstand the pressure. 
[NFPA 54:8.1.1.5] 

1214.1.6 Regulator and valve assemblies fabri- 
cated independently of the piping system in 
which they are to be installed shall be permitted 
to be tested with inert gas or air at the time of 
fabrication. [NFPA 54:8.1.1.6] 

1214.1.7 Test Medium. The test medium shall 
be air, nitrogen, carbon dioxide, or an inert gas. 
OXYGEN SHALL NEVER BE USED. [NFPA 
54:8.1.2] 

1214.2 Test Preparation. 

1214.2.1 Pipe joints, including welds, shall be 
left exposed for examination during the test. 
[NFPA 54:8.1.3.1] 

Exception: Covered or concealed pipe end 
joints that have been previously tested in 
accordance with this code. 

1214.2.2 Expansion joints shall be provided 
with temporary restraints, if required for the 
additional thrust load under test. [NFPA 
54:8.1.3.2] 

1214.2.3 Appliances and equipment that are not 
to be included in the test shall be either discon- 
nected from the piping or isolated by blanks, 
blind flanges, or caps. Flanged joints at which 
blinds are inserted to blank off other equipment 
during the test shall not be required to be tested. 
[NFPA 54:8.1.3.3] 

1214.2.4 Where the piping system is connected 
to appliances, equipment, or equipment compo- 
nents designed for operating pressures of less 
than the test pressure, such appliances, equip- 
ment, or equipment components shall be 
isolated from the piping system by discon- 
necting them and capping the outlets. [NFPA 
54:8.1.3.4] 



183 



1214.2 -Table 12-5 



UNIFORM PLUMBING CODE 



1214.2.5 Where the piping system is connected 
to appliances, equipment, or equipment compo- 
nents designed for operating pressures equal to 
or exceeding the test pressure, such appliances 
shall be isolated from the piping system by 
closing the individual appliance equipment 
shutoff valves. [NFPA 54:8.1.3.5] 

1214.2.6 Testing of piping systems shall be done 
with due regard for the safety of employees and 
the public during the test. Bulkheads, anchorage, 
and bracing suitably designed to resist test pres- 
sures shall be installed if necessary. Prior to 
testing, the interior of the pipe shall be cleared of 
foreign material. [NFPA 54:8.1.3.6] 

1214.3 Test Pressure. 

1214.3.1 Test pressure shall be measured with a 
manometer or with a pressure-measuring device 
designed and calibrated to read, record, or indi- 
cate a pressure loss due to leakage during the 
pressure test period. The source of pressure shall 
be isolated before the pressure tests are made. 
Mechanical gauges used to measure test pres- 
sures shall have a range such that the highest 
end of the scale does not exceed five (5) times 
the test pressure. [NFPA 54:8.1.4.1] 

1214.3.2 The test pressure to be used shall be 
not less than one and one-half (1-1/2) times the 
proposed maximum working pressure, but not 
less than three (3) psi (20 kPa), irrespective of 
design pressure. [NFPA 54:8.1.4.2] 

1214.3.3 Test duration shall be not less than 
one-half (1/2) hour for each five-hundred (500) 
cubic feet (14 m 3 ) of pipe volume or fraction 
thereof. When testing a system having a volume 
less than ten (10) cubic feet (0.28 m 3 ) or a system 
in a single-family dwelling, the test duration 
shall be not less than ten (10) minutes. The dura- 
tion of the test shall not be required to exceed 
twenty-four (24) hours. [NFPA 54:8.1.4.3] 

1214.4 Detection of Leaks and Defects. 

1214.4.1 The piping system shall withstand the 
test pressure specified without showing any 
evidence of leakage or other defects. Any reduc- 
tion of test pressures as indicated by pressure 
gauges shall be deemed to indicate the presence 
of a leak unless such reduction can be readily 
attributed to some other cause. [NFPA 54:8.1.5.1] 

1214.4.2 The leakage shall be located by means 
of an approved gas detector, a noncorrosive leak 
detection fluid, or other approved leak detection 
methods. Matches, candles, open flames, or 
other methods that provide a source of ignition 
shall not be used. [NFPA 54:8.1.5.2] 



1214.4.3 Where leakage or other defects are 
located, the affected portion of the piping system 
shall be repaired or replaced and retested. [See 
Section 1214.1.3.] [NFPA 54:8.1.5.3] 

1214.5 Piping Systems Leak Check. 

1214.5.1 Test Gases. Leak checks using fuel 
gas shall be permitted in piping systems that 
have been pressure-tested in accordance with 
Section 1214.0. [NFPA 54:8.2.1] 

1214.5.2 Turning Gas On. During the process 
of turning gas on into a system of new gas 
piping, the entire system shall be inspected to 
determine that there are no open fittings or ends 
and that valves at unused outlets are closed and 
plugged or capped. [NFPA 54-09:8.2.2] 

1214.5.3 Leak Check. Immediately after the gas 
is turned on into a new system or into a system 
that has been initially restored after an interrup- 
tion of service, the piping system shall be 
checked for leakage. Where leakage is indicated, 
the gas supply shall be shut off until the neces- 
sary repairs have been made. [NFPA 54:8.2.3] 

1214.5.4 Placing Appliance in Operation. Gas 
utilization appliance shall not be placed in oper- | 
ation until after the piping system has been 
tetsted in accordance with Section 1214.5.3 and 
purged in accordance with Section 1214.6.2. 
[NFPA 54:8.2.4] 

1214.6 Purging. 

1214.6.1 Removal From Service. When gas 
piping is to be opened for servicing, addition, or 
modification, the section to be worked on shall 
be turned off from the gas supply at the nearest 
convenient point and the line pressure vented to 
the outdoors or to ventilated areas of sufficient 
size to prevent accumulation of flammable 
mixtures. The remaining gas in this section of 
pipe shall be displaced with an inert gas as 
required by Table 12-5. [NFPA 54:8.3.1] 

TABLE 12-5 

Length of Piping Requiring Purging with Inert 

Gas for Servicing or Modification 

[NFPA 54: Table 8.3.1] 



Nominal Pipe 
Size (in.) 


Length of Piping 
Requiring Purging (ft.) 


2-1/2 


>50 


3 


>30 


4 


>15 


6 


>10 


8 or larger 


Any length 



For SI units: 1 ft. = 0.305 m. 



184 



FUEL PIPING 



1214.6-1216.4 



1214.6.2 Placing in Operation. When piping 
full of air is placed in operation, the air in the 
piping shall be displaced with fuel gas, except 
where such piping is required by Table 12-6 to 
be purged with an inert gas prior to introduction 
of fuel gas. The air can be safely displaced with 
fuel gas provided that a moderately rapid and 
continuous flow of fuel gas is introduced at one 
(1) end of the line and air is vented out at the 
other end. The fuel gas .flow shall be continued 
without interruption until the vented gas is free 
of air. The point of discharge shall not be left 
unattended during purging. After purging, the 
vent shall then be closed. Where required by 
Table 12-6, the air in the piping shall first be 
displaced with an inert gas, and the inert gas 
shall then be displaced with fuel gas. [NFPA 
54:8.3.2] 

TABLE 12-6 

Length of Piping Requiring Purging with Inert 

Gas Before Placing in Operation 

[NFPA 54: Table 8.3.2] 



Nominal Pipe 
Size (in.) 



Length of Piping 
Requiring Purging (ft.) 



3 

4 

6 

8 or larger 



>30 

>15 

>10 

Any length 



For SI units: 1 ft. = 0.305 m. 

1214.6.3 Discharge of Purged Gases. The 

open end of piping systems being purged shall 
not discharge into confined spaces or areas 
where there are sources of ignition unless 
precautions are taken to perform this operation 
in a safe manner by ventilation of the space, 
control of purging rate, and elimination of 
hazardous conditions. [NFPA 54:8.3.3] 

1214.6.4 Placing Appliances in Operation. 

After the piping has been placed in operation, 
appliances shall be purged and then placed in 
operation, as necessary. [NFPA 54:8.3.4] 

1215.0 Interconnections Between Gas Piping 
Systems. [NFPA 54:5.3] 

1215.1 Interconnections Supplying Separate 
Users. Where two (2) or more meters, or two (2) or 
more service regulators where meters are not 
provided, are located on the same premises and 
supply separate users, the gas-piping systems shall 



not be interconnected on the outlet side of the meters 
or service regulators. [NFPA 54:5.3.1] 

1215.2 Interconnections for Standby Fuels. 

Where supplementary gas for standby use is 
connected downstream from a meter or a service 
regulator where a meter is not provided, a device to 
prevent backflow shall be installed. [NFPA 54:5.3.2.1] 
A three-way valve installed to admit the standby 
supply and at the same time shut off the regular 
supply shall be permitted to be used for this 
purpose. [NFPA 54:5.3.2.2] 

1216.0 Required Gas Supply. 

1216.1 The following regulations, as set forth in this 
section and in Section 1217.0, Required Gas Piping 
Size, shall be the standard for the installation of gas 
piping. Natural gas regulations and tables are based 
on the use of gas having a specific gravity of sixty- 
hundredths (0.60), supplied at six (6) to eight (8) 
inches (152-203 mm) water column pressure at the 
outlet of the meter or regulator. For undiluted lique- 
fied petroleum gas, gas piping shall be permitted to 
be sized at eleven (11) inches (279 mm) water column 
pressure at the outlet of the meter or regulator and 
specific gravity of one and fifty -hundredths (1.50). 

Note: Where gas of a different specific gravity is 
to be delivered, the serving gas supplier should 
be contacted for specific gravity conversion 
factors to use in sizing piping systems from the 
pipe sizing tables in this chapter. 

1216.2 The hourly volume of gas required at each 
piping outlet shall be taken as not less than the 
maximum hourly rating as specified by the manufac- 
turer of the appliance or appliances to be connected 
to each such outlet. 

1 21 6.3 Where the gas appliances to be installed have 
not been definitely specified, Table 12-1 shall be 
permitted to be used as a reference to estimate 
requirements of typical appliances. 

To obtain the cubic feet per hour (L/sec.) of gas 
required, divide input of appliances by the average 
Btu (Watt-hour) heating value per cubic foot (L) of 
the gas. The average Btu (Watt-hour) per cubic foot 
(L) of the gas in the area of the installation shall be 
permitted to be obtained from the serving gas 
supplier. 

1216.4 The size of the supply piping outlet for any 
gas appliance shall not be less than one-half (1/2) 
inch (15 mm). 

The minimum size of any piping outlet for a 
mobile home shall be three-quarters (3/4) of an inch 
(20 mm). 



185 



1217.0-1217.4 



UNIFORM PLUMBING CODE 



1217.0 Required Gas Piping Size. 

1217.1 Pipe Sizing Methods. Where the pipe size is 
to be determined using any of the methods in 
Sections 1217.1.1 through 1217 '.1.3, the diameter of 
each pipe segment shall be obtained from the pipe- 
sizing tables in Section 1217.2 or from the sizing 
equations in Section 1217.3. [NFPA 54:6.1] 

1217.1.1 Longest Length Method. The pipe 
size of each section of gas piping shall be deter- 
mined using the longest length of piping from 
the point of delivery to the most remote outlet 
and the load of the section (see calculation 
example in Figure 12-2). [NFPA 54:6.1.1] 

1217.1.2 Branch Length Method. Pipe shall be 
sized as follows [NFPA 54:6.1.2]: 

(A) Pipe size of each section of the longest 
pipe run from the point of delivery to 
the most remote outlet shall be deter- 
mined using the longest run of piping 
and the load of the section. 

(B) The pipe size of each section of branch 
piping not previously sized shall be 
determined using the length of piping 
from the point of delivery to the most 
remote outlet in each branch and the 
load of the section. 

1217.1.3 Hybrid Pressure. The pipe size for 
each section of higher-pressure gas piping shall 
be determined using the longest length of piping 
from the point of delivery to the most remote 
line pressure regulator. The pipe size from the 
line pressure regulator to each outlet shall be 
determined using the length of piping from the 
regulator to the most remote outlet served by the 
regulator. [NFPA 54:6.1.3] 

1217.2 Tables for Sizing Gas-Piping Systems. 

Tables 12-8 through 12-41 shall be used to size gas 
piping in conjunction with one (1) of the methods 
described in Sections 1217.1.1 through 1217.1.3. 
[NFPA 54:6.2] 

1217.3 Sizing Equations. The inside diameter of 
smooth-wall pipe or tubing shall be determined by 
the sizing equations 12-1 or 12-2, using the equiva- 
lent pipe length determined by Sections 1217.1.1 
through 1217.1.3. [NFPA 54:6.4] 



where: 

D = inside diameter of pipe, inches 

Q = input rate appliance(s), cubic feet per hour at 
60°F (16°C) and 30-inch (759 mm) mercury 
column 

Pj - upstream pressure, psia (P l + 14.7) 

P 2 = downstream pressure, psia (P 2 + 14.7) 

L = equivalent length of pipe, feet 

AH -pressure drop, inches water column (27.7 in. 
H 2 = 1 psi) 

Equation 12-2 High-Pressure Gas Formula (1.5 psi 
[10.3 kPa] and above): [NFPA 54:6.4.2] 



D= 



Q ( 



,0.381 



18.93 



pPr-Pf)-Y T- 



206 



where: 

D = inside diameter of pipe, inches 

Q = input rate appliance(s), cubic feet per hour at 
60°F (16°C) and 30-inch (759 mm) mercury 
column 

P x = upstream pressure, psia (P 2 + 14.7) 

P 2 = downstream pressure, psia (P 2 + 14.7) 

L = equivalent length of pipe, feet. 

AH= pressure drop, inches water column (27.7 in. 
H 2 - 1 psi) 



TABLE 12-4 
Cr and Y for Natural Gas and Undiluted Propane 
at Standard Conditions [NFPA 54: Table 6.4.2] 



Formula Factors Gas 



Cr 



Natural Gas 0.6094 0.9992 

Undiluted Propane 1.2462 0.9910 

For SI units, 1 ft. 3 = 0.028 m 3 ; 1 ft. - 0.305 m; 1 in. water column 
= 0.249 kPa; 1 psi = 6.894 kPa; 1,000 Btu/h = 0.293 kW. 



Equation 12-1 Low-Pressure Gas Formula (Less 
than 1.5 psi [10.3 kPa]): [NFPA 54:6.4.1] 



D= 



Q 



0.381 



19.17 



\Cr x L/ 



0.206 



1217.4 To determine the size of each section of pipe 
in any system within the range of the Table, proceed 
as follows: 

(A) Measure the length of the pipe from the gas 
meter location to the most remote outlet on the 
system. 

(B) Select the length in feet column and row showing 
the distance, or the next longer distance if the 
table does not give the exact length. 



186 



FUEL PIPING 1217.4-1217.6 

(C) Starting at the most remote outlet, find in the 
row just selected the gas demand for that outlet. 
If the exact figure of demand is not shown, 
choose the next larger figure in the row. 

(D) At the top of this column will be found the 
correct size of pipe. 

(E) Using this same row, proceed in a similar 
manner for each section of pipe serving this 
outlet. For each section of pipe, determine the 
total gas demand supplied by that section. 
Where gas piping sections serve both heating 

I and cooling appliances and the installation 
prevents both units from operating simultane- 
ously, only the larger of the two (2) demand 
loads needs be used in sizing these sections. 

(F) Size each section of branch piping not previ- 
ously sized by measuring the distance from the 
gas meter location to the most remote outlet in 
that branch and follow the procedures of steps B, 
C, D, and E above. 

Note: Size branch piping in the order of their 
distance from the meter location, beginning with the 
most distant outlet not previously sized. 

1217.5 For conditions other than those covered by 
Section 1217.1, such as longer runs or greater gas 
demands, the size of each gas piping system shall be 
determined by standard engineering methods 
acceptable to the Authority Having Jurisdiction, and 
each such system shall be so designed that the total 
pressure drop between the meter or other point of 
supply and any outlet when full demand is being 

I supplied to all outlets, shall comply with the 
requirements of Section 1209.4. 

1 21 7.6 Where the gas pressure exceeds fourteen (14) 
inches (356 mm) or less than six (6) inches (152 mm) 
of water column, or when diversity demand factors 
are used, the design, pipe, sizing, materials, location, 
and use of such systems first shall be approved by 
the Authority Having Jurisdiction. Piping systems 
designed for pressures exceeding the serving gas 
supplier's standard delivery pressure shall have 
prior verification from the gas supplier of the avail- 
ability of the design pressure. 



187 



Figure 12-2 Example 



UNIFORM PLUMBING CODE 



Figure 12-2 Example Illustrating Use of Tables 12-1 and 12-8 

Problem: Determine the required pipe size of each section and outlet of the piping system shown in Figure 12-2. 
Gas to be used has a specific gravity of sixty-hundredths (0.60) and eleven-hundred (1,100) Btu per cubic foot 
(11.4 Watt-hour /L), delivered at eight (8) inch (203 mm) water column pressure. 











150,000 btu/h 






* (43,950 W) 








I Furnace 






O 








c 


cB 






hi 


^o Q® 






a 


! — 




Section 3 




; Section 2 Section 1 > 




20 ! 




10' 10' 




-{6096 mm) 




(3048 mm). ..(3048 mm) .. 


















O 




00 






= c 




o 






H 




_&. 






f— 




CD 




o 


^ m 




^ - 




c 


'4^ ~H 




3 




H 

m 


$ 00* 


# 




H 


3 * 






o 


3 


Qasf 


dieter 











30 gallon (113,6 I) 

Automatic 
Water Hester 



CO 

o 

3 



en 



Gas 
Refrigerator 



m 

Range 

Solution: 

(1 ) Maximum gas demand of outlet A — - 

32 cubic feet per hour (0.21 L/sec.) (from Table 12-1). 
Maximum gas demand of outlet B — 

3 cubic feet per hour (0.02 L/sec.) (from Table 12-1). 
Maximum gas demand of outlet C — 

59 cubic feet per hour (0.46 L/sec.) (from Table 12-1). 
Maximum gas demand of outlet D — 

136 cubic feet per hour (1.1 L/sec.) (150,000 Btu/hour [43,950 W]) 

divided by 1,100 Btu per cubic foot (11.4 Watt-hour /L) 

(2) The length of pipe from the gas meter to the most remote outlet (outlet A) is 60 feet (18,288 mm). 

(3) Using the length in feet column row marked 60 feet (18,288 mm) in Table 1.2-8: 

Outlet A, supplying 32 cubic feet per hour (0.21 L/sec), requires one-half (1/2) inch (15 mm) pipe. Section 
1, supplying outlets A and B, or 35 cubic feet per hour (0.24 L/sec.) requires one-half (1/2) inch (15 mm) 
pipe. 

Section 2, supplying outlets A, B, and C, or 94 cubic feet per hour (0,7 L/sec.) requires three-quarter (3/4) 
inch (20 mm) pipe. 

Section 3, supplying outlets A, B, C, and D, or 230 cubic feet per hour (1.8 L/sec), requires one (1) inch (25 
mm) pipe. 

(4) Using the column marked 60 feet (18,288 mm) in Table 12-8 (no column for actual length of 55 feet [16,764 
mm]: 

Outlet B supplying 3 cubic feet per hour (0.02 L/sec), requires one-half (1/2) inch (15 mm) pipe. 

Outlet C, supplying 59 cubic feet per hour (0.46 L/sec), requires one-half (1/2) inch (15 mm) pipe. 

(5) Using the column marked 60 feet (18,288 mm) in Table 12-8: 

Outlet D, supplying 136 cubic feet per hour (1.1 L/sec), requires (3/4) inch (20 mm) pipe. 



188 



FUEL PIPING 



Table 12-8 



Table 12-8 

Schedule 40 Metallic Pipe [NFPA 54: Table 6.2(b)] 





Gas: 


Natural 


Inlet Pressure: 


Less than 2 psi 


Pressure Drop: 


0.5 in w.c. 


Specific Gravity: 


0.60 




Pipe Size (in.) 


Nominal: 


1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


5 


6 


8 


10 


12 


Actual ID: 


0.622 


0.824 


1.049 


1.380 


1.610 


2.067 


2.469 


3.068 


4.026 


5.047 


6.065 


7.981 


10.020 


11.938 


Length (ft) 


Capacity in Cubic Feet of Gas per Hour 


10 


172 


360 


678 


1,390 


2,090 


4,020 


6,400 


11,300 


23,100 


41,800 


67,600 


139,000 


252,000 


399,000 


20 


118 


247 


466 


957 


1,430 


2,760 


4,400 


7,780 


15,900 


28,700 


46,500 


95,500 


173,000 


275,000 


30 


95 


199 


374 


768 


1,150 


2,220 


3,530 


6,250 


12,700 


23,000 


37,300 


76,700 


139,000 


220,000 


40 


81 


170 


320 


657 


985 


1,900 


3,020 


5,350 


10,900 


19,700 


31,900 


65,600 


119,000 


189,000 


50 


72 


151 


284 


583 


873 


1,680 


2,680 


4,740 


9,660 


17,500 


28,300 


58,200 


106,000 


167,000 


60 


65 


137 


257 


528 


791 


1,520 


2,430 


4,290 


8,760 


15,800 


25,600 


52,700 


95,700 


152,000 


70 


60 


126 


237 


486 


728 


1,400 


2,230 


3,950 


8,050 


14,600 


23,600 


48,500 


88,100 


139,000 


80 


56 


117 


220 


452 


677 


1,300 


2,080 


3,670 


7,490 


13,600 


22,000 


45,100 


81,900 


130,000 


90 


52 


110 


207 


424 


635 


1,220 


1,950 


3,450 


7,030 


12,700 


20,600 


42,300 


76,900 


122,000 


100 


50 


104 


195 


400 


600 


1,160 


1,840 


3,260 


6,640 


12,000 


19,500 


40,000 


72,600 


115,000 


125 


44 


92 


173 


355 


532 


1,020 


1,630 


2,890 


5,890 


10,600 


17,200 


35,400 


64,300 


102,000 


150 


40 


83 


157 


322 


482 


928 


1,480 


2,610 


5,330 


9,650 


15,600 


32,100 


58,300 


92,300 


175 


37 


77 


144 


296 


443 


854 


1,360 


2,410 


4,910 


8,880 


14,400 


29,500 


53,600 


84,900 


200 


34 


71 


134 


275 


412 


794 


1,270 


2,240 


4,560 


8,260 


13,400 


27,500 


49,900 


79,000 


250 


30 


63 


119 


244 


366 


704 


1,120 


1,980 


4,050 


7,320 


11,900 


24,300 


44,200 


70,000 


300 


27 


57 


108 


221 


331 


638 


1,020 


1,800 


3,670 


6,630 


10,700 


22,100 


40,100 


63,400 


350 


25 


53 


99 


203 


305 


587 


935 


1,650 


3,370 


6,100 


9,880 


20,300 


36,900 


58,400 


400 


23 


49 


92 


189 


283 


546 


870 


1,540 


3,140 


5,680 


9,190 


18,900 


34,300 


54,300 


450 


22 


46 


86 


177 


266 


512 


816 


1,440 


2,940 


5,330 


8,620 


17,700 


32,200 


50,900 


500 


21 


43 


82 


168 


251 


484 


771 


1,360 


2,780 


5,030 


8,150 


16,700 


30,400 


48/100 


550 


20 


41 


78 


159 


239 


459 


732 


1,290 


2,640 


4,780 


7,740 


15,900 


28,900 


45,700 


600 


19 


39 


74 


152 


228 


438 


699 


1,240 


2,520 


4,560 


7,380 


15,200 


27,500 


43,600 


650 


18 


38 


71 


145 


218 


420 


669 


1,180 


2,410 


4,360 


7,070 


14,500 


26,400 


41,800 


700 


17 


36 


68 


140 


209 


403 


643 


1,140 


2,320 


4,190 


6,790 


14,000 


25,300 


40,100 


750 


17 


35 


66 


135 


202 


389 


619 


1,090 


2,230 


4,040 


6,540 


13,400 


24,400 


38,600 


800 


16 


34 


63 


130 


195 


375 


598 


1,060 


2,160 


3,900 


6,320 


13,000 


23,600 


37,300 


850 


16 


33 


61 


126 


189 


363 


579 


1,020 


2,090 


3,780 


6,110 


12,600 


22,800 


36,100 


900 


15 


32 


59 


122 


183 


352 


561 


992 


2,020 


3,660 


5,930 


12,200 


22,100 


35,000 


950 


15 


31 


58 


118 


178 


342 


545 


963 


1,960 


3,550 


5,760 


11,800 


21,500 


34,000 


1,000 


14 


30 


56 


115 


173 


333 


530 


937 


1,910 


3,460 


5,600 


11,500 


20,900 


33,100 


1,100 


14 


28 


53 


109 


164 


316 


503 


890 


1,810 


3,280 


5,320 


10,900 


19,800 


31,400 


1,200 


13 


27 


51 


104 


156 


301 


480 


849 


1,730 


3,130 


5,070 


10,400 


18,900 


30,000 


1,300 


12 


26 


49 


100 


150 


289 


460 


813 


1,660 


3,000 


4,860 


9,980 


18,100 


28,700 


1,400 


12 


25 


47 


96 


144 


277 


442 


781 


1,590 


2,880 


4,670 


9,590 


17,400 


27,600 


1,500 


11 


24 


45 


93 


139 


267 


426 


752 


1,530 


2,780 


4,500 


9,240 


16,800 


26,600 


1,600 


11 


23 


44 


89 


134 


258 


411 


727 


1,480 


2,680 


4,340 


8,920 


16,200 


25,600 


1,700 


11 


22 


42 


86 


130 


250 


398 


703 


1,430 


2,590 


4,200 


8,630 


15,700 


24,800 


1,800 


10 


22 


41 


84 


126 


242 


386 


682 


1,390 


2,520 


4,070 


8,370 


15,200 


24,100 


1,900 


10 


21 


40 


81 


122 


235 


375 


662 


1,350 


2,440 


3,960 


8,130 


14,800 


23,400 


2,000 


NA 


20 


39 


79 


119 


229 


364 


644 


1,310 


2,380 


3,850 


7,910 


14,400 


22,700 



Note: All table entries are rounded to 3 significant digits. 



189 



Table 12-9 



UNIFORM PLUMBING CODE 



Table 12-9 

Schedule 40 Metallic Pipe [NFPA 54: Table 6.2(c)] 





Gas: 


Natural 


Inlet Pressure: 


2.0 psi 


Pressure Drop: 


1.0 psi 


Specific Gravity: 


0.60 




Pipe Size (in.) 


Nominal: 


1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


Actual ID: 


0.622 


0.824 


1.049 


1.380 


1.610 


2.067 


2.469 


3.068 


4.026 


Length (ft.) 


Capacity in Cubic Feet of Gas per Hour 


10 


1,510 


3,040 


5,560 


11,400 


17,100 


32,900 


52,500 


92,800 


189,000 


20 


1,070 


2,150 


3,930 


8,070 


12,100 


23,300 


37,100 


65,600 


134,000 


30 


869 


1,760 


3,210 


6,590 


9,880 


19,000 


30,300 


53,600 


109,000 


40 


753 


1,520 


2,780 


5,710 


8,550 


16,500 


26,300 


46,400 


94,700 


50 


673 


1,360 


2,490 


5,110 


7,650 


14,700 


23,500 


41,500 


84,700 


60 


615 


1,240 


2,270 


4,660 


6,980 


13,500 


21,400 


37,900 


77,300 


70 


569 


1,150 


2,100 


4,320 


6,470 


12,500 


19,900 


35,100 


71,600 


80 


532 


1,080 


1,970 


4,040 


6,050 


11,700 


18,600 


32,800 


67,000 


90 


502 


1,010 


1,850 


3,810 


5,700 


11,000 


17,500 


30,900 


63,100 


100 


462 


934 


1,710 


3,510 


5,260 


10,100 


16,100 


28,500 


58,200 


125 


414 


836 


1,530 


3,140 


4,700 


9,060 


14,400 


25,500 


52,100 


150 


372 


751 


1,370 


2,820 


4,220 


8,130 


13,000 


22,900 


46,700 


175 


344 


695 


1,270 


2,601 


3,910 


7,530 


12,000 


21 r 200 


43,300 


200 


318 


642 


1,170 


2,410 


3,610 


6,960 


11,100 


19,600 


40,000 


250 


279 


583 


1,040 


2,140 


3,210 


6,180 


9,850 


17,400 


35,500 


300 


253 


528 


945 


1,940 


2,910 


5,600 


8,920 


15,800 


32,200 


350 


232 


486 


869 


1,790 


2,670 


5,150 


8,210 


14,500 


29,600 


400 


216 


452 


809 


1,660 


2,490 


4,790 


7,640 


13,500 


27,500 


450 


203 


424 


759 


1,560 


2,330 


4,500 


7,170 


12,700 


25,800 


500 


192 


401 


717 


1,470 


2,210 


4,250 


6,770 


12,000 


24,400 


550 


182 


381 


681 


1,400 


2,090 


4,030 


6,430 


11,400 


23,200 


600 


174 


363 


650 


1,330 


2,000 


3,850 


6,130 


10,800 


22,1.00 


650 


166 


348 


622 


1,280 


1,910 


3,680 


5,870 


10,400 


21,200 


700 


160 


334 


598 


1,230 


1,840 


3,540 


5,640 


9,970 


20,300 


750 


154 


322 


576 


1,180 


1,770 


3,410 


5,440 


9,610 


19,600 


800 


149 


311 


556 


1,140 


1,710 


3,290 


5,250 


9,280 


18,900 


850 


144 


301 


538 


1,100 


1,650 


3,190 


5,080 


8,980 


18,300 


900 


139 


292 


522 


1,070 


1,600 


3,090 


4,930 


8,710 


17,800 


950 


135 


283 


507 


1,040 


1,560 


3,000 


4,780 


8,460 


17,200 


1,000 


132 


275 


493 


1,010 


1,520 


2,920 


4,650 


8,220 


16,800 


1,100 


125 


262 


468 


960 


1,440 


2,770 


4,420 


7,810 


15,900 


1,200 


119 


250 


446 


917 


1,370 


2,640 


4,220 


7,450 


15,200 


1,300 


114 


239 


427 


878 


1,320 


2,530 


4,040 


7,140 


14,600 


1,400 


no 


230 


411 


843 


1,260 


2,430 


3,880 


6,860 


14,000 


1,500 


106 


221 


396 


812 


1,220 


2,340 


3,740 


6,600 


13,500 


1,600 


1.02 


214 


382 


784 


1,180 


2,260 


3,610 


6,380 


13,000 


1,700 


99 


207 


370 


759 


1,140 


2,190 


3,490 


6,170 


12,600 


1,800 


96 


200 


358 


736 


1,100 


2,120 


3,390 


5,980 


12,200 


1,900 


93 


195 


348 


715 


1,070 


2,060 


3,290 


5,810 


11,900 


2,000 


91 


189 


339 


695 


1,040 


2,010 


3,200 


5,650 


11,500 



Note: All table entries are rounded to 3 significant digits. 



190 



FUEL PIPING 



Table 12-10 



Table 12-10 

Schedule 40 Metallic Pipe [NFPA 54: Table 6.2(d)] 















Gas: 


Natural 




Inlet Pressure: 


3.0 psi 


Pressure Drop: 


2.0 psi 


Specific Gravity. 


0.60 




Pipe Size (in.) 


Nominal: 


1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


Actual ID: 


0.622 


0.824 


1.049 


1.380 


1.610 


2.067 


2.469 


3.068 


4.026 


Length (ft.) 


Capacity in Cubic Feet of Gas per Hour 


10 


2,350 


4,920 


9,270 


19,000 


28,500 


54,900 


87,500 


155,000 


316,000 


20 


1,620 


3,380 


6,370 


1.3/100 


19,600 


37,700 


60,100 


106,000 


217,000 


30 


1,300 


2,720 


5,110 


10,500 


15,700 


30,300 


48,300 


85,400 


174,000 


40 


1,110 


2,320 


4,380 


8,990 


13,500 


25,900 


41,300 


73,100 


149,000 


50 


985 


2,060 


3,880 


7,970 


11,900 


23,000 


36,600 


64,800 


132,000 


60 


892 


1,870 


3,520 


7,220 


10,800 


20,800 


33,200 


58,700 


120,000 


70 


821 


1,720 


3,230 


6,640 


9,950 


19,200 


30,500 


54,000 


110,000 


80 


764 


1,600 


3,010 


6,180 


9,260 


17,800 


28,400 


50,200 


102,000 


90 


717 


1,500 


2,820 


5,800 


8,680 


16,700 


26,700 


47,100 


96,100 


100 


677 


1,420 


2,670 


5,470 


8,200 


15,800 


25,200 


44,500 


90,800 


125 


600 


1,250 


2,360 


4,850 


7,270 


14,000 


22,300 


39,500 


80,500 


150 


544 


1,140 


2,140 


4,400 


6,590 


12,700 


20,200 


35,700 


72,900 


175 


500 


1,050 


1,970 


4,040 


6,060 


11,700 


18,600 


32,900 


67,100 


200 


465 


973 


1,830 


3,760 


5,640 


10,900 


17,300 


30,600 


62,400 


250 


412 


862 


1,620 


3,330 


5,000 


9,620 


15,300 


27,100 


55,300 


300 


374 


781 


1,470 


3,020 


4,530 


8,720 


13,900 


24,600 


50,100 


350 


344 


719 


1,350 


2,780 


4,170 


8,020 


12,800 


22,600 


46,100 


400 


320 


669 


1,260- 


2,590 


3,870 


7,460 


11,900 


21,000 


42,900 


450 


300 


627 


1,180 


2,430 


3,640 


7,000 


11,200 


19,700 


40,200 


500 


283 


593 


1,120 


2,290 


3,430 


6,610 


10,500 


18,600 


38,000 


550 


269 


563 


1,060 


2,180 


3,260 


6,280 


10,000 


17,700 


36,100 


600 


257 


537 


1,010 


2,080 


3,110 


5,990 


9,550 


16,900 


34,400 


650 


246 


514 


969 


1,990 


2,980 


5,740 


9,150 


16,200 


33,000 


700 


236 


494 


931 


1,910 


2,860 


5,510 


8,790 


15,500 


31,700 


750 


228 


476 


897 


1,840 


2,760 


5,310 


8,470 


15,000 


30,500 


800 


220 


460 


866 


1,780 


2,660 


5,130 


8,180 


14,500 


29,500 


850 


213 


445 


838 


1,720 


2,580 


4,960 


7,910 


14,000 


28,500 


900 


206 


431 


812 


1,670 


2,500 


4,810 


7,670 


13,600 


27,700 


950 


200 


419 


789 


1,620 


2,430 


4,670 


7,450 


13,200 


26,900 


1,000 


195 


407 


767 


1,580 


2,360 


4,550 


7,240 


12,800 


26,100 


1,100 


185 


387 


729 


1,500 


2,240 


4,320 


6,890 


12,200 


24,800 


1,200 


177 


369 


695 


1,430 


2,140 


4,120 


6,570 


11,600 


23,700 


1,300 


169 


353 


666 


1,370 


2,050 


3,940 


6,290 


11,100 


22,700 


1,400 


162 


340 


640 


1,310 


1,970 


3,790 


6,040 


10,700 


21,800 


1,500 


156 


327 


616 


1,270 


1,900 


3,650 


5,820 


10,300 


21,000 


1,600 


151 


316 


595 


1,220 


1,830 


3,530 


5,620 


10,000 


20,300 


1,700 


146 


306 


576 


1,180 


1,770 


3,410 


5,440 


9,610 


19,600 


1,800 


142 


296 


558 


1,150 


1,720 


3,310 


5,270 


9,320 


19,000 


1,900 


138 


288 


542 


1,110 


1,670 


3,210 


5,120 


9,050 


18,400 


2,000 


134 


280 


527 


1,080 


1,620 


3,120 


4,980 


8,800 


18,000 



Note: A1J table entries are rounded to 3 significant digits 



191 



Table 12-11 



UNIFORM PLUMBING CODE 



Table 12-11 

Schedule 40 Metallic Pipe [NFPA 54: Table 6.2(e)] 





Gas: 


Natural 


Inlet Pressure: 


5.0 psi 


Pressure Drop: 


3.5 psi 


Specific Gravity: 


0.60 




Pipe Size (in.) 


Nominal: 


1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


Actual ID: 


0.622 


0.824 


1.049 


1.380 


1.610 


2.067 


2.469 


3.068 


4.026 


Length (ft.) 


Capacity in Cubic Feet of Gas per Hour 


10 


3,190 


6,430 


11,800 


24,200 


36,200 


69,700 


111,000 


196,000 


401,000 


20 


2,250 


4,550 


8,320 


17,100 


25,600 


49,300 


78,600 


139,000 


283,000 


30 


1,840 


3,720 


6,790 


14,000 


20,900 


40,300 


64,200 


113,000 


231,000 


40 


1,590 


3,220 


5,880 


12,100 


18,100 


34,900 


55,600 


98,200 


200,000 


50 


1,430 


2,880 


5,260 


10,800 


16,200 


31,200 


49,700 


87,900 


179,000 


60 


1,300 


2,630 


4,800 


9,860 


14,800 


28,500 


45,400 


80,200 


164,000 


70 


1,200 


2,430 


4,450 


9,130 


13,700 


26,400 


42,000 


74,300 


1.51,000 


80 


1,150 


2,330 


4,260 


8,540 


12 7 800 


24,700 


39,300 


69,500 


142,000 


90 


1,060 


2,150 


3,920 


8,050 


12,100 


23,200 


37,000 


65,500 


134,000 


100 


979 


1,980 


3,620 


7,430 


11,100 


21,400 


34,200 


60,400 


123,000 


125 


876 


1,770 


3,240 


6,640 


9,950 


19,200 


30,600 


54,000 


110,000 


150 


786 


1,590 


2,910 


5,960 


8,940 


17,200 


27,400 


48,500 


98,900 


175 


728 


1,470 


2,690 


5,520 


8,270 


15,900 


25,400 


44,900 


91,600 


200 


673 


1,360 


2,490 


5,100 


7,650 


14,700 


23,500 


41,500 


84,700 


250 


558 


1,170 


2,200 


4,510 


6,760 


13,000 


20,800 


36,700 


74,900 


300 


506 


1,060 


1,990 


4,090 


6,130 


11,800 


18,800 


33,300 


67,800 


350 


465 


973 


1,830 


3,760 


5,640 


10,900 


17,300 


30,600 


62,400 


400 


433 


905 


1,710 


3,500 


5,250 


10,100 


16,100 


28,500 


58,100 


450 


406 


849 


1,600 


3,290 


4,920 


9,480 


15,100 


26,700 


54,500 


500 


384 


802 


1,510 


3,100 


4,650 


8,950 


14,300 


25,200 


51,500 


550 


364 


762 


1,440 


2,950 


4,420 


8,500 


13,600 


24,000 


48,900 


600 


348 


727 


1,370 


2,810 


4,210 


8,110 


12,900 


22,900 


46,600 


650 


333 


696 


1,310 


2,690 


4,030 


7,770 


12,400 


21,900 


44,600 


700 


320 


669 


1,260 


2,590 


3,880 


7,460 


11,900 


21,000 


42,900 


750 


308 


644 


1,210 


2,490 


3,730 


7,190 


11,500 


20,300 


41,300 


800 


298 


622 


1,170 


2,410 


3,610 


6,940 


11,100 


19,600 


39,900 


850 


288 


602 


1,130 


2,330 


3,490 


6,720 


10,700 


18,900 


38,600 


900 


279 


584 


1,100 


2,260 


3,380 


6,520 


10,400 


18,400 


37,400 


950 


271 


567 


1,070 


2,190 


3,290 


6,330 


10,100 


17,800 


36,400 


1,000 


264 


551 


1,040 


2,130 


3,200 


6,150 


9,810 


17,300 


35,400 


1,100 


250 


524 


987 


2,030 


3,030 


5,840 


9,320 


16,500 


33,600 


1,200 


239 


500 


941 


1,930 


2,900 


5,580 


8,890 


15,700 


32,000 


1,300 


229 


478 


901 


1,850 


2,770 


5,340 


8,510 


15,000 


30,700 


1,400 


220 


460 


866 


1,780 


2,660 


5,130 


8,180 


14,500 


29,500 


1,500 


212 


443 


834 


1,710 


2,570 


4,940 


7,880 


13,900 


28,400 


1,600 


205 


428 


806 


1,650 


2,480 


4,770 


7,610 


13,400 


27,400 


1,700 


198 


414 


780 


1,600 


2,400 


4,620 


7,360 


13,000 


26,500 


1,800 


192 


401 


756 


1,550 


2,330 


4,480 


7,140 


12,600 


25,700 


1,900 


186 


390 


734 


1,510 


2,260 


4,350 


6,930 


12,300 


25,000 


2,000 


181 


379 


714 


1,470 


2,200 


4,230 


6,740 


11,900 


24,300 



Note; All table entries are rounded to 3 significant digits. 



192 



FUEL PIPING 



Table 12-12 



Table 12-12 

Semi-Rigid Copper Tubing [NFPA 54: Table 6.2(f)] 





Gas: 


Natural 


Inlet Pressure: 


Less than 2 psi 


Pressure Drop: 


0.3 in. w.c. 


Specific Gravity: 


0.60 




Tube Size (in.) 




K&L: 


1/4 


3/8 


1/2 


5/8 


3/4 


1 


1-1/4 


1-1/2 


2 


Nominal: 
























ACR: 


3/8 


1/2 


5/8 


3/4 


7/8 


1-1/8 


1-3/8 


- 


- 


Outside: 


0.375 


0.500 


0.625 


0.750 


0.875 


1.125 


1.375 


1.625 


2.125 


Inside:* 


0.305 


0.402 


0.527 


0.652 


0.745 


0.995 


1.245 


1.481 


1.959 


Length (ft.) 








Capacity in 


Cubic Feet of Gas per Hour 




10 


20 


42 


85 


148 


210 


448 


806 


1,270 


2,650 


20 


14 


29 


58 


102 


144 


308 


554 


873 


1,820 


30 


11 


23 


47 


82 


116 


247 


445 


701 


1,460 


40 


10 


20 


40 


70 


99 


211 


381 


600 


1,250 


50 


NA 


17 


35 


62 


88 


187 


337 


532 


1,110 


60 


NA 


16 


32 


56 


79 


170 


306 


482 


1,000 


70 


NA 


14 


29 


52 


73 


156 


281 


443 


924 


80 


NA 


13 


27 


48 


68 


145 


262 


413 


859 


90 


NA 


13 


26 


45 


64 


136 


245 


387 


806 


100 


NA 


12 


24 


43 


60 


129 


232 


'366 


761 


125 


NA 


11 


22 


38 


53 


114 


206 


324 


675 


150 


NA 


10 


20 


34 


48 


103 


186 


294 


612 


175 


NA 


NA 


18 


31 


45 


95 


171 


270 


563 


200 


NA 


NA 


17 


29. 


41 


89 


159 


251 


523 


250 


NA 


NA 


15 


26 


37 


78 


141 


223 


464 


300 


NA 


NA 


13 


23 


33 


71 


128 


202 


420 


350 


NA 


NA 


12 


22 


31 


65 


118 


186 


387 


400 


NA 


NA 


11 


20 


28 


61 . 


110 


173 


360 


450 


NA 


NA 


11 


19 


27 


57 


103 


162 


338 


500 


NA 


NA 


10 


18 


25 


54 


97 


153 


319 


550 


NA 


NA 


NA 


17 


24 


51 


92 


145 


303 


600 


NA 


NA 


NA 


16 


23 


49 


88 


139 


289 


650 


NA 


NA 


NA 


15 


22 


47 


84 


133 


277 


700 


NA 


NA 


NA 


15 


21 


45 


81 


128 


266 


750 


NA 


NA 


NA 


14 


20 


43 


78 


123 


256 


800 


NA 


NA 


NA 


14 


20 


42 


75 


119 


247 


850 


NA 


NA 


NA 


13 


19 


40 


73 


115 


239 


900 


NA 


NA 


NA 


13 


18 


39 


71 


111 


232 


950 


NA 


NA 


NA 


13 


18 


38 


69 


108 


225 


1,000 


NA 


NA 


NA 


12 


17 


37 


67 


105 


219 


1,100 


NA 


NA 


NA 


12 


16 


35 


63 


100 


208 


1,200 


NA 


NA 


NA 


11 


16 


34 


60 


95 


199 


1,300 


NA 


NA 


NA 


11 


15 


32 


58 


91 


190 


1,400 


NA 


NA 


NA 


10 


14 


31 


56 


88 


183 


1,500 


NA 


NA 


NA 


NA. 


14 


30 


54 


84 


176 


1,600 


NA 


NA 


NA 


NA 


13 


29 


52 


82 


170 


1,700 


NA 


NA 


NA 


NA 


13 


28 


50 


79 


164 


1,800 


NA 


NA 


NA 


NA 


13 


27 


49 


77 


159 


1,900 


NA 


NA 


NA 


NA 


12 


26 


47 


74 


155 


2,000 


NA 


NA 


NA 


NA 


12 


25 


46 


72 


151 



NA means a flow of less than 10 cfh. 

Note: All table entries are rounded to 3 significant digits. 

*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products. 



193 



Table 12-13 



UNIFORM PLUMBING CODE 



Table 12-13 

Semi-Rigid Copper Tubing [NFPA 54: Table 6.2(g)] 





Gas: 


Natural 


Inlet Pressure: 


Less than 2 psi 


Pressure Drop: 


0.5 in, w.c. 


Specific Gravity: 


0.60 












Tube Size (in 


■) 






Nominal: 


K&L: 


1/4 


3/8 


1/2 


5/8 


3/4 


1 


1-1/4 


1-1/2 


2 


ACR: 


3/8 


1/2 


5/8 


3/4 


7/8 


1-1/8 


1-3/8 


- 


- 


Outside: 


0.375 


0.500 


0.625 


0.750 


0.875 


1.125 


1.375 


1.625 


2.125 


Inside:* 


0.305 


0.402 


0.527 


0.652 


0.745 


0.995 


1.245 


1.481 


1.959 


Length (ft.) 


Capacity in Cubic Feet of Gas per Hour 


10 


27 


55 


111 


195 


276 


590 


1,060 


1,680 


3,490 


20 


18 


38 


77 


134 


190 


406 


730 


1,150 


2,400 


30 


15 


30 


61 


107 


152 


326 


586 


925 


1,930 


40 


13 


26 


53 


92 


131 


279 


502 


791 


1,650 


50 


11 


23 


47 


82 


116 


247 


445 


701 


1,460 


60 


10 


21 


42 


74 


105 


224 


403 


635 


1,320 


70 


NA 


19 


39 


68 


96 


206 


371 


585 


1,220 


80 


NA 


18 


36 


63 


90 


192 


345 


544 


1,130 


90 


NA 


17 


34 


59 


84 


180 


324 


510 


1,060 


100 


NA 


16 


32 


56 


79 


170 


306 


482 


1,000 


125 


NA 


14 


28 


50 


70 


151 


271 


427 


890 


150 


NA 


13 


26 


45 


64 


136 


245 


387 


806 


175 


NA 


12 


24 


41 


59 


125 


226 


356 


742 


200 


NA 


11 


22 


39 


55 


117 


210 


331 


690 


250 


NA 


NA 


20 


34 


48 


103 


186 


294 


612 


300 


NA 


NA 


18 


31 


44 


94 


169 


266 


554 


350 


NA 


NA 


16 


28 


40 


86 


155 


245 


510 


400 


NA 


NA 


15 


26 


38 


80 


144 


228 


474 


450 


NA 


NA 


14 


25 


35 


75 


135 


214 


445 


500 


NA 


NA 


13 


23 


33 


71 


128 


202 


420 


550 


NA 


NA 


13 


22 


32 


68 


122 


192 


399 


600 


NA 


NA 


12 


21 


30 


64 


116 


183 


381 


650 


NA 


NA 


12 


20 


29 


62 


111 


175 


365 


700 


NA 


NA 


11 


20 


28 


59 


107 


168 


350 


750 


NA 


NA 


11 


19 


27 


57 


103 


162 


338 


800 


NA 


NA 


10 


18 


26 


55 


99 


156 


326 


850 


NA 


NA 


10 


18 


25 


53 


96 


151 


315 


900 


NA 


NA 


NA 


17 


24 


52 


93 


147 


306 


950 


NA 


NA 


NA 


17 


24 


50 


90 


143 


297 


1,000 


NA 


NA 


NA 


16 


23 


49 


88 


139 


289 


1,100 


NA 


NA 


NA 


15 


22 


46 


84 


132 


274 


1,200 


NA 


NA 


NA 


15 


21 


44 


80 


126 


262 


1,300 


NA 


NA 


NA 


14 


20 


42 


76 


120 


251 


1,400 


NA 


NA 


NA 


13 


19 


41 


73 


116 


241. 


1,500 


NA 


NA 


NA 


13 


18 


39 


71 


111 


232 


1,600 


NA 


NA 


NA 


13 


18 


38 


68 


108 


224 


1,700 


NA 


NA 


NA 


12 


17 


37 


66 


104 


21.7 


1,800 


NA 


NA 


NA 


12 


17 


36 


64 


101 


210 


1,900 


NA 


NA 


NA 


11 


16 


35 


62 


98 


204 


2,000 


NA 


NA 


NA 


11 


16 


34 


60 


95 


199 



NA means a flow of less than 10 cfh. 

Note: All table entries are rounded to 3 significant digits. 

Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products. 



194 



FUEL PIPING 



Table 12-14 



Table 12-14 

Semi-Rigld Copper Tubing [NFPA 54-09: Table 6.2(h)] 



















Gas: 


Natural 






Inlet Pressure: 


Less than 2 psi 


Pressure Drop: 


1.0 in. w,c. 


Specific Gravity: 


0.60 


INTENDED USE: Tube Sizing Between House Line Regulator and the Appliance. 


Tube Size (in.) 




K&L: 


1/4 


3/8 


1/2 


5/8 


3/4 1 


1-1/4 


1-1/2 


2 


Nominal: 






















ACR: 


3/8 


1/2 


5/8 


3/4 


7/8 


1-1/8 


1-3/8 


- 


- 


Outside: 


0.375 


0.500 


0.625 


0.750 


0.875 


1.125 


1.375 


1.625 


2.125 


Inside:* 


0.305 


0.402 


0.527 


0.652 


0.745 


0.995 


1.245 


1.481 


1.959 


Length (ft.) 


Capacity in Cubic Feet of Gas per Hour 


10 


39 


80 


162 


283 


402 


859 


1,550 


2,440 


5,080 


20 


27 


55 


111 


195 


276 


590 


1,060 


1,680 


3,490 


30 


21 


44 


89 


156 


222 


474 


853 


1,350 


2,800 


40 


18 


38 


77 


134 


190 


406 


730 


1,150 


2,400 


50 


16 


33 


68 


119 


168 


359 


647 


1,020 


2,130 


60 


15 


30 


61 


107 


152 


326 


586 


925 


1,930 


70 


13 


28 


57 


99 


140 


300 


539 


851 


1,770 


80 


13 


26 


53 


92 


131 


279 


502 


791 


1,650 


90 


12 


24 


49 


86 


122 


262 


471 


742 


1,550 


100 


11 


23 


47 


82 


116 


247 


445 


701 


1,460 


125 


NA 


20 


41 


72 


103 


219 


394 


622 


1,290 


150 


NA 


18 


37 


65 


93 


198 


357 


563 


1,170 


175 


NA 


17 


34 


60 


85 


183 


329 


518 


1,080 


200 


NA 


16 


32 


56 


79 


170 


306 


482 


1,000 


250 


NA 


14 


28 


50 


70 


151 


271 


427 


890 


300 


NA 


13 


26 


45 


64 


136 


245 


387 


806 


350 


NA 


12 


24 


41 


59 


125 


226 


356 


742 


400 


NA 


11 


22 


39 


55 


117 


210 


331 


690 


450 


NA 


10 


21 


36 


51 


110 


197 


311 


647 


500 


NA 


NA 


20 


34 


48 


103 


186 


294 


612 


550 


NA 


NA 


19 


32 


46 


98 


177 


279 


581 


600 


NA 


NA 


18 


31 


44 


94 


169 


266 


554 


650 


NA 


NA 


17 


30 


42 


90 


162 


255 


531 


700 


NA 


NA 


16 


28 


40 


86 


155 


245 


510 


750 


NA 


NA 


16 


27 


39 


83 


150 


236 


4.91 


800 


NA 


NA 


15 


26 


38 


80 


144 


228 


474 


850 


NA 


NA 


15 


26 


36 


78 


140 


220 


459 


900 


NA 


NA 


14 


25 


35 


75 


135 


214 


445 


950 


NA 


NA 


14 


24 


34 


73 


1.32 


207 


432 


1,000 


NA 


NA 


13 


23 


33 


71 


1.28 


202 


420 


1,100 


NA 


NA 


13 


22 


32 


68 


122 


392 


399 


1,200 


NA 


NA 


12 


21 


30 


64 


116 


183 


381 


1,300 


NA 


NA 


12 


20 


29 


62 


111 


175 


365 


1,400 


NA 


NA 


11 


20 


28 


59 


107 


168 


350 


1,500 


NA 


NA 


11 


19 


27 


57 


103 


162 


338 


1,600 


NA 


NA 


10 


18 


26 


55 


99 


156 


326 


1,700 


NA 


NA 


10 


18 


25 


53 


96 


151 


315 


1,800 


NA 


NA 


NA 


17 


24 


52 


93 


147 


306 


1,900 


NA 


NA 


NA 


17 


24 


50 


90 


143 


297 


2,000 


NA 


NA 


NA 


16 


23 


49 


88 


139 


289 



NA means a flow of less than 10 cfh. 

Note: All table entries are rounded to 3 significant digits. 

*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products 



195 



Table 12-15 



UNIFORM PLUMBING CODE 



Table 12-15 

Semi-Rigid Copper Tubing [NFPA 54: Table 6.2(i)] 



















Gas: 


Natural 






Inlet Pressure: 


Less than 2 psi 


Pressure Drop: 


17.0 in. w.c. 


Specific Gravity: 


0.60 




Tube Size (in.) 


Nominal: 


K&L: 


1/4 


3/8 


1/2 


5/8 


3/4 


1 


1-1/4 


1-1/2 


2 


ACR: 


3/8 


1/2 


5/8 


3/4 


7/8 


1-1/8 


1-3/8 


- 


- 


Outside: 


0.375 


0.500 


0.625 


0.750 


0.875 


1.125 


1.375 


1.625 


2.125 


Inside:* 


0.305 


0.402 


0.527 


0.652 


0.745 


0.995 


1.245 


1.481 


1.959 


Length (ft.) 


Capacity in Cubic Feet of Gas per Hour 


10 


190 


391 


796 


1,390 


1,970 


4,220 


7,590 


12,000 


24,900 


20 


130 


269 


547 


956 


1,360 


2,900 


5,220 


8,230 


17,100 


30 


105 


216 


439 


768 


1,090 


2,330 


4,190 


6,610 


13,800 


40 


90 


185 


376 


657 


932 


1,990 


3,590 


5,650 


11,800 


50 


79 


164 


333 


582 


826 


1,770 


3,180 


5,010 


10,400 


60 


72 


148 


302 


528 


749 


1,600 


2,880 


4,540 


9,460 


70 


66 


137 


278 


486 


689 


1,470 


2,650 


4,180 


8,700 


80 


62 


127 


258 


452 


641 


1,370 


2,460 


3,890 


8,090 


90 


58 


119 


243 


424 


601 


1,280 


2,310 


3,650 


7,590 


100 


55 


113 


229 


400 


568 


1,210 


2,180 


3,440 


7,170 


125 


4.8 


100 


203 


355 


503 


1,080 


1,940 


3,050 


6,360 


150 


44 


90 


184 


321 


456 


974 


1,750 


2,770 


5,760 


175 


40 


83 


169 


296 


420 


896 


1,610 


2,540 


5,300 


200 


38 


77 


157 


275 


390 


834 


1,500 


2,370 


4,930 


250 


33 


69 


140 


244 


346 


739 


1,330 


2,100 


4,370 


300 


30 


62 


126 


221 


313 


670 


1,210 


1,900 


3,960 


350 


28 


57 


116 


203 


288 


616 


1,110 


1,750 


3,640 


400 


26 


53 


108 


189 


268 


573 . 


1,030 


1,630 


3,390 


450 


24 


50 


102 


177 


252 


■ 538 


968 


1,530 


3,180 


500 


23 


47 


96 


168 


238 


508 


914 


1,440 


3,000 


550 


22 


45 


91 


159 


226 


482 


868 


1,370 


2,850 


600 


21 


43 


87 


152 


215 


460 


829 


1,310 


2,720 


650 


20 


41 


83 


145 


206 


441 


793 


1,250 


2,610 


700 


19 


39 


80 


140 


198 


423 


762 


1,200 


2,500 


750 


18 


38 


77 


135 


191 


408 


734 


1,160 


2,410 


800 


18 


37 


74 


130 


184 


394 


709 


1,120 


2,330 


850 


17 


35 


72 


126 


178 


381 


686 


1,080 


2,250 


900 


17 


34 


70 


122 


173 


370 


665 


1,050 


2,180 


950 


16 


33 


68 


118 


168 


359 


646 


1,020 


2,120 


1,000 


16 


32 


66 


115 


163 


349 


628 


991 


2,060 


1,100 


15 


31 


63 


109 


155 


332 


597 


941 


1,960 


1,200 


14 


29 


60 


104 


148, 


316 


569 


898 


1,870 


1,300 


14 


28 


57 


100 


142 


303 


545 


860 


1,790 


1,400 


13 


27 


55 


96 


136 


291 


524 


826 


1,720 


1,500 


13 


26 


53 


93 


131 


280 


505 


796 


1,660 


1,600 


12 


25 


51 


89 


127 


271 


487 


768 


1,600 


1,700 


12 


24 


49 


86 


123 


262 


472 


744 


1,550 


1,800 


11 


24 


48 


84 


119 


254 


457 


721 


1,500 


1,900 


11 


23 


47 


81 


115 


247 


444 


700 


1,460 


2,000 


11 


22 


45 


79 


112 


240 


432 


681 


1,420 



Note: All table entries are rounded to 3 significant digits. 

*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products. 



196 



FUEL PIPING 



Table 12-16 



Table 12-16 

Semi-Rigid Copper Tubing [NFPA 54: Table 6.2(j)] 





Gas: 


Natural 


Inlet Pressure: 


2.0 psi 


Pressure Drop: 


1 .0 psi 


Specific Gravity: 


0.60 




Tube Size (in.) 


Nominal: 


K&L: 


1/4 


3/8 


1/2 


5/8 


3/4 


1 


1-1/4 


1-1/2 


2 


ACR: 


3/8 


1/2 


5/8 


3/4 


7/8 


1-1/8 


1-3/8 


- 


- 


Outside: 


0.375 


0.500 


0.625 


0.750 


0.875 


1.125 


1.375 


1.625 


2.125 


Inside:* 


0.305 


0.402 


0.527 


0.652 


0.745 


0.995 


1.245 


1.481 


1.959 


Length (ft.) 


Capacity in Cubic Feet of Gas per Hour 


10 


245 


506 


1,030 


1,800 


2,550 


5,450 


9,820 


15,500 


32,200 


20 


169 


348 


708 


1,240 


1,760 


3,750 


6,750 


10,600 


22,200 


30 


135 


279 


568 


993 


1,410 


3,010 


5,420 


8,550 


17,800 


40 


116 


239 


486 


850 


1,210 


2,580 


4,640 


7,310 


15,200 


50 


103 


212 


431 


754 


1,070 


2,280 


4,110 


6,480 


13,500 


60 


93 


192 


391 


683 


969 


2,070 


3,730 


5,870 


12,200 


70 


86 


177 


359 


628 


891 


1,900 


3,430 


5,400 


11,300 


80 


80 


164 


334 


584 


829 


1,770 


3,190 


5,030 


10,500 


90 


75 


154 


314 


548 


778 


1,660 


2,990 


4,720 


9,820 


100 


71 


146 


296 


518 


735 


1,570 


2,830 


4,450 


9,280 


125 


63 


129 


263 


459 


651 


1,390 


2,500 


3,950 


8,220 


150 


57 


117 


238 


416 


590 


1,260 


2,270 


3,580 


7,450 


175 


52 


108 


219 


383 


543 


1,160 


2,090 


3,290 


6,850 


200 


49 


100 


204 


356 


505 


1,080 


1,940 


3,060 


6,380 


250 


43 


89 


181 


315 


448 


956 


1,720 


2,710 


5,650 


300 


39 


80 


164 


286 


406 


866 


1,560 


2,460 


5,120 


350 


36 


74 


150 


263 


373 


797 


1,430 


2,260 


4,710 


400 


33 


69 


140 


245 


347 


741 


1,330 


2,100 


4,380 


450 


31 


65 


131 


230 


326 


696 


1,250 


1,970 


4,110 


500 


30 


61 


124 


217 


308 


657 


1,180 


1,870 


3,880 


550 


28 


58 


118 


206 


292 


624 


1,120 


1,770 


3,690 


600 


27 


55 


112 


196 


279 


595 


1,070 


1,690 


3,520 


650 


26 


53 


108 


188 


267 


570 


1,030 


1,620 


3,370 


700 


25 


51 


103 


181 


256 


548 


986 


1,550 


3,240 


750 


24 


49 


100 


174 


247 


528 


950 


1,500 


3,120 


800 


23 


47 


96 


168 


239 


510 


917 


1,450 


3,010 


850 


22 


46 


93 


163 


231 


493 


888 


1,400 


2,920 


900 


22 


44 


90 


158 


224 


478 


861 


1,360 


2,830 


950 


21 


43 


88 


153 


217 


464 


836 


1,320 


2,740 


1,000 


20 


42 


85 


149 


211 


452 


813 


1,280 


2,670 


1,100 


19 


40 


81 


142 


201 


429 


772 


1,220 


2,540 


1,200 


18 


38 


77 


135 


192 


409 


737 


1,160 


2,420 


1,300 


18 


36 


74: 


129 


183 


392 


705 


1,110 


2,320 


1,400 


17 


35 


71 


124 


176 


376 


678 


1,070 


2,230 


1,500 


16 


34 


68 


120 


170 


363 


653 


1,030 


2,140 


1,600 


16 


33 


66 


116 


164 


350 


630 


994 


2,070 


1,700 


15 


31 


64 


112 


159 


339 


610 


962 


2,000 


1,800 


15 


30 


62 


108 


154 


329 


592 


933 


1,940 


1,900 


14 


30 


60 


105 


149 


319 


575 


906 


1,890 


2,000 


14 


29 


59 


102 


145 


310 


559 


881 


1,830 



Note: All table entries are rounded to 3 significant digits. 

*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products. 



197 



Table 12-17 



UNIFORM PLUMBING CODE 



Table 12-17 

Semi-Rigid Copper Tubing [NFPA 54-09: Table 6.2(k)] 



















Gas: 


Natural 






Inlet Pressure: 


2.0 psi 


Pressure Drop; 


1.5 psi 


Specific Gravity: 


0.60 


INTENDED USE; Pipe Sizing Between Point of Delivery am* the House tine Regulator. Total Load Supplied by 


a 


Single House Line Regulator Not Exceeding 150 Cubic Feet per Hour. f 




Tube Size (in.) 


Nominal: 


K&L: 


1/4 


3/8 


1/2 


5/8 


3/4 


1 


1-1/4 


1-1/2 


2 


ACR: 


3/8 


1/2 


5/8 


3/4 


7/8 


1-1/8 


1-3/8 


- 


- 


Outside: 


0.375 


0.500 


0.625 


0.750 


0.875 


1.125 


1.375 


1.625 


2.125 


Inside:* 


0.305 


0.402 


0.527 


0.652 


0.745 


0.995 


1.245 


1.481 


1.959 


Length (ft.) 


Capacity in Cubic Feet of Gas per Hour 


10 


303 


625 


1,270 


2,220 


3,150 


6,740 


12,100 


19,100 


39,800 


20 


208 


430 


874 


1,530 


2,170 


4,630 


8,330 


13,100 


27,400 


30 


167 


345 


702 


1,230 


1,740 


3,720 


6,690 


10,600 


22,000 


40 


143 


295 


601 


1,050 


1,490 


3,180 


5,730 


9,030 


18,800 


50 


127 


262 


532 


931 


1,320 


2,820 


5,080 


8,000 


16,700 


60 


115 


237 


482 


843 


1,200 


2,560 


4,600 


7,250 


15,100 


70 


106 


218 


444 


776 


1,100 


2,350 


4,230 


6,670 


13,900 


80 


98 


203 


413 


722 


1,020 


2,190 


3,940 


6,210 


12,900 


90 


92 


190 


387 


677 


961 


2,050 


3,690 


5,820 


12,100 


100 


87 


180 


366 


640 


907 


1,940 


3,490 


5,500 


11,500 


125 


77 


159 


324 


567 


804 


1,720 


3,090 


4,880 


10,200 


150 


70 


144 


294 


514 


729 


1,560 


2,800 


4,420 


9,200 


175 


64 


133 


270 


472 


670 


1,430 


2,580 


4,060 


8,460 


200 


60 


124 


252 


440 


624 


1,330 


2,400 


3,780 


7,870 


250 


53 


110 


223 


390 


553 


1,180 


2,130 


3,350 


6,980 


300 


48 


99 


202 


353 


501 


1,070 


1,930 


3,040 


6,320 


350 


44 


91 


186 


325 


461 


984 


1,770 


2,790 


5,820 


400 


41 


85 


173 


302 


429 


916 


1,650 


2,600 


5,410 


450 


39 


80 


162 


283 


402 


859 


1,550 


2,440 


5,080 


500 


36 


75 


153 


268 


380 


811 


1,460 


2,300 


4,800 


550 


35 


72 


146 


254 


361 


771 


1,390 


2,190 


4,560 


600 


33 


68 


139 


243 


344 


735 


1,320 


2,090 


4,350 


650 


32 


65 


133 


232 


330 


704 


1,270 


2,000 


4,160 


700 


30 


63 


128 


223 


317 


676 


1,220 


1,920 


4,000 


750 


29 


60 


123 


215 


305 


652 


1,1.70 


1,850 


3,850 


800 


28 


58 


119 


208 


295 


629 


1,130 


1,790 


3,720 


850 


27 


57 


115 


201 


285 


609 


1,100 


1,730 


3,600 


900 


27 


55 


111 


195 


276 


590 


1,060 


1,680 


3,490 


950 


26 


53 


108 


189 


268 


573 


1,030 


1,630 


3,390 


1,000 


25 


52 


105 


184 


261 


558 


1,000 


1,580 


3,300 


1,100 


24 


49 


100 


175 


248 


530 


954 


1,500 


3,130 


1,200 


23 


47 


95 


167 


237 


505 


910 


1,430 


2,990 


1,300 


22 


45 


91 


160 


227 


484 


871 


1,370 


2,860 


1,400 


21 


43 


88 


153 


218 


465 


837 


1,320 


2,750 


1,500 


20 


42 


85 


148 


210 


448 


806 


1,270 


2,650 


1,600 


19 


40 


82 


143 


202 


432 


779 


1,230 


2,560 


1,700 


19 


39 


79 


138 


196 


419 


753 


1,190 


2,470 


1,800 


18 


38 


77 


134 


190 


406 


731 


1,150 


2,400 


1,900 


18 


37 


74 


130 


184 


394 


709 


1,120 


2,330 


2,000 


17 


36 


72 


126 


179 


383 


690 


1,090 


2,270 



Note: All table entries are rounded to 3 significant digits. 

Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products. 

When this table is used to size the tubing upstream of a line pressure regulator, the pipe or tubing downstream of the line pressure regulator shall be 
sized using a pressure drop no greater than 1 in. w.c. 



198 



FUEL PIPING 



Table 12-18 



Table 12-18 

Semi-Rigid Copper Tubing [NFPA 54: Table 6.2(1)] 





Gas: 


Natural 


Inlet Pressure: 


5.0 psi 


Pressure Drop: 


3.5 psi 


Specific Gravity: 


0.60 




Tube Size (in.) 




K&L: 


1/4 


3/8 


1/2 


5/8 


3/4 


1 


1-1/4 


1-1/2 


2 


























ACR: 


3/8 


1/2 


5/8 


3/4 


7/8 


1-1/8 


1-3/8 


- 


- 


Outside: 


0.375 


0.500 


0.625 


0.750 


0.875 


1.125 


1.375 


1.625 


2.125 


Inside: 4 


0.305 


0.402 


0.527 


0.652 


0.745 


0.995 


1.245 


1.481 


1.959 


Length (ft.) 








Capacity in 


Cubic Feet of Gas per Hour 




10 


511 


1,050 


2,140 


3,750 


5,320 


11,400 


20,400 


32,200 


67,100 


20 


351 


724 


1,470 


2,580 


3,650 


7,800 


14,000 


22,200 


46,100 


30 


282 


582 


1,180 


2,070 


2,930 


6,270 


11,300 


17,800 


37,000 


40 


241 


498 


1,010 


1,770 


2,510 


5,360 


9,660 


15,200 


31,700 


50 


214 


441 


898 


1,570 


2,230 


4,750 


8,560 


13,500 


28,100 


60 


194 


400 


813 


1,420 


2,020 


4,310 


7,750 


12,200 


25,500 


70 


178 


368 


748 


1,310 


1,860 


3,960 


7,130 


11,200 


23,400 


80 


166 


342 


696 


1,220 


1,730 


3,690 


6,640 


10,500 


21,800 


90 


156 


321 


653 


1,140 


1,620 


3,460 


6,230 


9,820 


20,400 


100 


147 


303 


617 


1,080 


1,530 


3,270 


5,880 


9,270 


19,300 


125 


130 


269 


547 


955 


1,360 


2,900 


5,210 


8,220 


17,100 


150 


118 


243 


495 


866 


1,230 


2,620 • 


4,720 


7,450 


15,500 


175 


109 


224 


456 


796 


1,130 


2,410 


4,350 


6,850 


14,300 


200 


101 


208 


424 


741 


1,050 


2,250 


4,040 


6,370 


13,300 


250 


90 


185 


376 


657 


932 


1,990 


3,580 


5,650 


11,800 


300 


81 


167 


340 


595 


844 


1,800 


3,250 


5,120 


10,700 


350 


75 


154 


313 


547 


777 


1,660 


2,990 


4,710 


9,810 


400 


69 


143 


291 


509 


722 


1,540 


2,780 


4,380 


9,120 


450 


65 


134 


273 


478 


678 


1,450 


2,610 


4,110 


8,560 


500 


62 


127 


258 


451 


640 


1,370 


2,460 


3,880 


8,090 


550 


58 


121 


245 


429 


608 


1,300 


2,340 


3,690 


7,680 


600 


56 


115 


234 


409 


580 


1,240 


2,230 


3,520 


7,330 


650 


53 


110 


224 


392 


556 


1,190 


2,140 


3,370 


7,020 


700 


51 


106 


215 


376 


534 


1,140 


2,050 


3,240 


6,740 


750 


49 


102 


207 * 


362 


514 


1,100 


1,980 


3,120 


6,490 


800 


48 


98 


200 


350 


497 


1,060 


1,910 


3,010 


6,270 


850 


46 


95 


194 


339 


481 


1,030 


1,850 


2,910 


6,070 


900 


45 


92 


188 


328 


466 


1,000 


1,790 


2,820 


5,880 


950 


43 


90 


182 


319 


452 


967 


1,740 


2,740 


5,710 


1,000 


42 


87 


177 


310 


440 


940 


1,690 


2,670 


5,560 


1,100 


40 


83 


169 


295 


418 


893 


1,610 


2,530 


5,280 


1,200 


38 


79 


161 


281 


399 


852 


1,530 


2,420 


5,040 


1,300 


37 


76 


154 


269 


382 


816 


1,470 


2,320 


4,820 


1,400 


35 


7T~ 


148 


259 


367 


784 


1,410 


2,220 ■ 


4,630 


1,500 


34 


70 


143 


249 


353 


755 


1,360 


2,140 


4,460 


1,600 


33 


68 


138 


241 


341 


729 


1,310 


2,070 


4,310 


1,700 


32 


65 


133 


233 


330 


705 


1,270 


2,000 


4,170 


1,800 


31 


63 


129 


226 


320 


684 


1,230 


1,940 


4,040 


1,900 


30 


62 


125 


219 


311 


664 


1,200 


1,890 


3,930 


2,000 


29 


60 


122 


213 


302 


646 


1,160 


1,830 


3,820 



Note: All table entries are rounded to 3 significant digits. 

*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products. 



199 



Table 12-1 9 -Table 12-20 



UNIFORM PLUMBING CODE 



Table 12-19 

Corrugated Stainless Steel Tubing (CSST) [NFPA 54-09: Table 6.2(m)] 





Gas: 


Natural 


Inlet Pressure: 


Less than 2 psi 


Pressure Drop: 


0.5 in. w.c. 


Specific Gravity: 


0.60 




Tube Size (EHD)* 


Flow Designation: 


13 


15 


18 


19 


23 


25 


30 | 31 | 37 


39 


46 ( 48 


60 


62 


Length (ft) 


Capacity in Cubic Feet of Gas per Hour 


5 


46 


63 


115 


134 


225 


270 


471 


546 


895 


1,037 


1,790 


2,070 


3,660 


4,140 


10 


32 


44 


82 


95 


161 


192 


330 


383 


639 


746 


1,260 


1,470 


2,600 


2,930 


15 


25 


35 


66 


77 


132 


157 


267 


310 


524 


615 


1,030 


1,200 


2,140 


2,400 


20 


22 


31 


58 


67 


116 


137 


231 


269 


456 


536 


888 


1,050 


1,850 


2,080 


25 


19 


27 


52 


60 


104 


122 


206 


240 


409 


482 


793 


936 


1,660 


1,860 


30 


18 


25 


47 


55 


96 


112 


188 


218 


374 


442 


723 


856 


1,520 


1,700 


40 


15 


21 


41 


47 


83 


97 


162 


188 


325 


386 


625 


742 


1,320 


1,470 


50 


13 


19 


37 


42 


75 


87 


144 


168 


292 


347 


559 


665 


1,180 


1,320 


60 


12 


17 


34 


38 


68 


80 


131 


153 


267 


318 


509 


608 


1,080 


1,200 


70 


11 


16 


31 


36 


63 


74 


121 


141 


248 


295 


471 


563 


1,000 


1,110 


80 


10 


15 


29 


33 


60 


69 


113 


132 


232 


277 


440 


527 


940 


1,040 


90 


10 


14 


28 


32 


57 


65 


107 


125 


219 


262 


415 


498 


887 


983 


100 


9 


13 


26 


30 


54 


62 


101 


118 


208 


249 


393 


472 


843 


933 


150 


7 


10 


20 


23 


42 


48 


78 


91 


171 


205 


320 


387 


691 


762 


200 


6 


9 


18 


21 


38 


44 


7\ 


82 


148 


179 


277 


336 


600 


661 


250 


5 


8 


16 


19 


34 


39 


63 


74 


133 


161 


247 


301 


538 


591 


300 


5 


7 


15 


17 


32 


36 


57 


67 


95 


148 


226 


275 


492 


540 



*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of 

EHD, the greater the gas capacity of the tubing. 

Notes: 

(1) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbers of bends and /or fittings shall be increased 
by an equivalent length of tubing to the following equation: L - I3n, where L is additional length (ft) of tubing and n is the number of additional 
fittings and /or bends. 

(2) All table entries are rounded to 3 significant digits. 

Table 12-20 

Corrugated Stainless Steel Tubing (CSST) [NFPA 54: Table 6.2(n)] 





Gas: 


Natural 


Inlet Pressure: 


Less than : 


2 psi 


Pressure Drop: 


3.0 in. w.c. 


Specific Gravity: 


0.60 




Tube Size (EHD)* 


Flow Designation : 


13 


15 


18 


19 


23 


25 


30 31 


37 


46 | 48 


60 


62 


Length (ft) 










Capacity 


n Cubic Feet of Gas per Hou 


r 






5 


120 


160 


277 


327 


529 


649 


1,180 


1,370 


2/140 


4,430 


5,010 


8,800 


10,100 


10 


83 


112 


197 


231 


380 


462 


828 


958 


1,530 


3,200 


3,560 


6,270 


7,160 


15 


67 


90 


161 


189 


313 


379 


673 


778 


1,250 


2,540 


2,910 


5,140 


5,850 


20 


57 


78 


140 


164 


273 


329 


580 


672 


1,090 


2,200 


2,530 


4,460 


5,070 


25 


51 


69 


125 


147 


245 


295 


518 


599 


978 


1,960 


2,270 


4,000 


4,540 


30 


46 


63 


115 


134 


225 


270 


471 


546 


895 


1,790 


2,070 


3,660 


4,140 


40 


39 


54 


100 


116 


196 


234 


407 


471 


778 


1,550 


1,800 


3,180 


3,590 


50 


35 


48 


89 


104 


176 


210 


363 


421 


698 


1,380 


1,610 


2,850 


3,210 


60 


32 


44 


82 


95 


161 


192 


330 


383 


639 


1,260 


1,470 


2,600 


2,930 


70 


29 


41 


76 


88 


150 


178 


306 


355 


593 


1,170 


1,360 


2,420 


2,720 


80 


27 


38 


71 


82 


141 


167 


285 


331 


555 


1,090 


1,280 


2,260 


2,540 


90 


26 


36 


67 


77 


133 


157 


268 


311 


524 


1,030 


1,200 


2,140 


2,400 


100 


24 


34 


63 


73 


126 


149 


254 


295 


498 


974 


1,140 


2,030 


2,280 


150 


19 


27 


52 


60 


104 


122 


206 


240 


409 


793 


936 


1,660 


1,860 


200 


17 


23 


45 


52 


91 


106 


178 


207 


355 


686 


812 


1,440 


1,610 


250 


15 


21 


40 


46 


82 


95 


159 


184 


319 


613 


728 


1,290 


1,440 


300 


13 


19 


37 


42 


7b 


87 


144 


168 


234 


559 


665 


1,180 


1,320 



*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of 

EHD, the greater the gas capacity of the tubing. 

Notes: 

(1) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbers of bends and /or fittings shall be increased 
by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional 
f i ttings and / or bends . 

(2) All table entries are rounded to 3 significant digits. 



200 



FUEL PIPING 



Table 12-21 -Table 12-22 



Table 12-21 

Corrugated Stainless Steel Tubing (CSST) [NFPA 54: Table 6.2(o)] 





Gas: 


Natural 


Inlet Pressure: 


Less than 2 psi 


Pressure Drop: 


6.0 in. w.c. 


Specific Gravity: 


0.60 




Tube Size (EHD)* 


Flow Designation: 


13 


15 


18 


19 


23 


25 


30 1 31 


37 


46 48 


60 


62 


Length (ft) 










Capacity 


n Cubic Feet of Gas per Hour 






5 


173 


229 


389 


461 


737 


911 


1,690 


1,950 


3,000 


6,280 


7,050 


12,400 


14,260 


10 


120 


160 


277 


327 


529 


649 


1,180 


1,370 


2,140 


4,430 


5,010 


8,800 


10,100 


15 


96 


130 


227 


267 


436 


532 


960 


1,110 


1,760 


3,610 


4,100 


7,210 


8,260 


20 


83 


112 


197 


231 


380 


462 


828 


958 


1,530 


3,120 


3,560 


6,270 


7,160 


25 


74 


99 


176 


207 


342 


41.4 


739 


855 


1,370 


2,790 


3,190 


5,620 


6,400 


30 


67 


90 


161 


189 


313 


379 


673 


778 


1,250 


2,540 


2,910 


5/140 


5,850 


40 


57 


78 


140 


164 


273 


329 


580 


672 


1,090 


2,200 


2,530 


4,460 


5,070 


50 


51 


69 


125 


147 


245 


295 


518 


599 


978 


1,960 


2,270 


4,000 


4,540 


60 


46 


63 


115 


134 


225 


270 


471 


546 


895 


1,790 


2,070 


3,660 


4,140 


70 


42 


58 


106 


124 


209 


250 


435 


505 


830 


1,660 


1,920 


3,390 


3,840 


80 


39 


54 


100 


116 


196 


234 


407 


471 


778 


■1,550 


1,800 


3,180 


3,590 


90 


37 


51 


94 


109 


185 


221 


383 


444 


735 


1,460 


1,700 


3,000 


3,390 


100 


35 


48 


89 


104 


176 


210 


363 


421 


698 


1,380 


1,610 


2,850 


3,210 


150 


28 


39 


73 


85 


145 


172 


294 


342 


573 


1,130 


1,320 


2,340 


2,630 


200 


24 


34 


63 


73 


126 


149 


254 


295 


498 


974 


1,140 


2,030 


2,280 


250 


21 


30 


57 


66 


114 


134 


226 


263 


447 


870 


1,020 


1,820 


2,040 


300 


19 


27 


52 


60 


104 


122 


206 


240 


409 


793 


936 


1,660 


1,860 



*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of 

EHD, the greater the gas capacity of the tubing. 

Notes: 

(1) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbers of bends and /or fittings shall be increased 
by an equivalent length of tubing to the following equation: I - 1.3m, where L is additional length (ft) of tubing and n is the number of additional 
fittings and /or bends. 

(2) All table entries are rounded to 3 significant digits. 



Table 12-22 

Corrugated Stainless Steel Tubing (CSST) [NFPA 54-09: Table 6.2(p)] 





Gas: 


Natural 


Inlet Pressure: 


2.0 psi 


Pressure Drop: 


1.0 psi 


Specific Gravity: 


0.60 




Tube Size (EHD)* 


Flow Designation: 


13 


15 


18 


19 


23 


25 


30 1 31 1 37 


39 


46 1 48 


60 


62 


Length (ft) 


Capacity in Cubic Feet of Gas per Hour 


10 


270 


353 


587 


700 


1100 


1,370 


2,590 


2,990 


4,510 


5,037 


9,600 


10,700 


18,600 


21,600 


25 


166 


220 


374 


444 


709 


876 


1,620 


1,870 


2,890 


3,258 


6,040 


6,780 


11,900 


13,700 


30 


151 


200 


342 


405 


650 


801 


1,480 


1,700 


2,640 


2,987 


5,510 


6,200 


10,900 


12,500 


40 


129 


172 


297 


351 


567 


696 


1,270 


1,470 


2,300 


2,605 


4,760 


5,380 


9,440 


10,900 


50 


115 


154 


266 


314 


510 


624 


1,140 


1,310 


2,060 


2,343 


4,260 


4,820 


8,470 


9,720 


75 


93 


124 


218 


257 


420 


512 


922 


1,070 


1,690 


1,932 


3,470 


3,950 


6,940 


7,940 


80 


.89 


120 


211 


249 


407 


496 


892 


1,030 


1,640 


1,874 


3,360 


3,820 


6,730 


7,690 


100 


79 


107 


189 


222 


366 


445 


795 


920 


1,470 


1,685 


3,000 


3,420 


6,030 


6,880 


150 


64 


87 


155 


182 


302 


364 


646 


748 


1,210 


1,389 


2,440 


2,800 


4,940 


5,620 


200 


55 


75 


135 


157 


263 


317 


557 


645 


1,050 


1,212 


2,110 


2,430 


4,290 


4,870 


250 


49 


67 


121 


141 


236 


284 


497 


576 


941 


1,090 


1,890 


2,180 


3,850 


4,360 


300 


44 


61 


110 


129 


217 


260 


453 


525 


862 


999 


1,720 


1,990 


3,520 


3,980 


400 


38 


52 


96 


111 


189 


225 


390 


453 


749 


871 


1,490 


1,730 


3,060 


3,450 


500 


34 


46 


86 


100 


170 


202 


348 


404 


552 


783 


1,330 


1,550 


2,74.0 


3,090 



*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of 

EHD, the greater the gas capacity of the tubing. 

Notes: 

(1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 3/4 psi, do not use this table. Consult with 
regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator may vary with flow rate. 

(2) CAUTION: Capacities shown in table may exceed maximum capacity for a selected regulator. Consult with regulator or tubing manufacturer for 
guidance. 

(3) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbers of bends and /or fittings shall be increased 
by an equivalent length of tubing according to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of 
additional fittings and /or bends. 

(4) All table entries are rounded to 3 significant digits. 



201 



Table 12-23 -Table 12-24 



UNIFORM PLUMBING CODE 



Table 12-23 

Corrugated Stainless Steel Tubing (CSST) [NFPA 54-09: Table 6.2(q)] 





Gas: 


Natural 


Inlet Pressure: 


5.0 psi 


Pressure Drop: 


3.5 psi 


Specific Gravity: 


0.60 
















Tube Size (EHD)* 










Flow Designation: 


13 


15 


18 


19 


23 


25 


30 


31 


37 


39 


46 48 


60 


62 


Length (ft) 


Capacity in Cubic Feet of Gas per Hour 


10 


523 


674 


1,080 


1,300 


2,000 


2,530 


4,920 


5,660 


8,300 


9,140 


18,100 


19,800 


34,400 


40,400 


25 


322 


420 


691 


827 


1,290 


1,620 


3,080 


3,540 


5,310 


5,911 


11,400 


12,600 


22,000 


25,600 


30 


292 


382 


632 


755 


1,180 


1,480 


2,800 


3,230 


4,860 


5,420 


10,400 


11,500 


20,100 


23,400 


40 


251 


329 


549 


654 


1,030 


1,280 


2,420 


2,790 


4,230 


4,727 


8,970 


10,000 


17,400 


20,200 


50 


223 


293 


492 


586 


926 


1,150 


2,160 


2,490 


3,790 


4,251 


8,020 


8,930 


15,600 


18,100 


75 


180 


238 


403 


479 


763 


944 


1,750 


2,020 


3,110 


3,506 


6,530 


7,320 


12,800 


14,800 


80 


174 


230 


391 


463 


740 


915 


1,690 


1,960 


3,020 


3,4.00 


6,320 


7,090 


12,400 


14,300 


100 


154 


205 


350 


415 


665 


820 


1,510 


1,740 


2,710 


3,057 


5,650 


6,350 


11,100 


12,800 


150 


124 


166 


287 


339 


548 


672 


1,230 


1,420 


2,220 


2,521 


4,600 


5,200 


9,130 


10,500 


200 


107 


143 


249 


294 


478 


584 


1,060 


1,220 


1,930 


2,199 


3,980 


4,510 


7,930 


9,090 


250 


95 


128 


223 


263 


430 


524 


945 


1,090 


1,730 


1,977 


3,550 


4,040 


7,110 


8,140 


300 


86 


116 


204 


240 


394 


479 


860 


995 


1,590 


1,813 


3,240 


3,690 


6,500 


7,430 


400 


74 


100 


177 


208 


343 


416 


742 


858 


1,380 


1,581 


2,800 


3,210 


5,650 


6,440 


500 


66 


89 


159 


186 


309 


373 


662 


766 


1,040 


1,422 


2,500 


2,870 


5,060 


5,760 



*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of 

EHD, the greater the gas capacity of the tubing. 

Notes: 

(1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 1 psi, do not use this table. Consult with regu- 
lator manufacturer for pressure drops and capacity factors. Pressure drops across regulator may vary with the flow rate. 

(2) CAUTION: Capacities shown in table may exceed maximum capacity of selected regulator. Consult tubing manufacturer for guidance. 

(3) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbers of bends and /or fittings shall be increased 
by an equivalent length of tubing to the following equation: L = 1.3)1, where L is additional length (ft) of tubing and n is the number of additional 
fittings and /or bends. 

(4) All table entries are rounded to 3 significant digits. 



Table 12-24 

Polyethylene Plastic Pipe [NFPA 54: Table 6.2(r)] 





Gas: 


Natural 


Inlet Pressure: 


Less than 2 psi 


Pressure Drop: 


0.3 in. w.c. 


Specific Gravity: 


0.60 




Pipe Size (in.) 


Nominal OD: 


1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


Designation: 


SDR 9.33 


SDR 11.0 


SDR 11.00 


SDR 10.00 


SDR 11.00 


SDR 11.00 


Actual ID: 


0.660 


0.860 


1.077 


1.328 


1.554 


1.943 


Length (ft) 


Capacity in Cubic Feet of Gas per Hour 


:io 


153 


305 


551 


955 


1,440 


2,590 


20 


105 


210 


379 


656 


991 


1,780 


30 


84 


169 


304 


527 


796 


1,430 


40 


72 


144 


260 


451 


681 


1,220 


50 


64 


128 


231 


400 


604 


1,080 


60 


58 


116 


209 


362 


547 


983 


70 


53 


107 


192 


333 


503 


904 


80 


50 


99 


179 


310 


468 


841 


90 


46 


93 


168 


291 


439 


789 


100 


44 


88 


159 


275 


415 


745 


125 


39 


78 


141 


243 


368 


661 


150 


35 


71 


127 


221 


333 


598 


175 


32 


65 


117 


203 


306 


551 


200 


30 


60 


109 


189 


285 


512 


250 


27 


54 


97 


167 


253 


454 


300 


24 


48 


88 


152 


229 


411 


350 


22 


45 


81 


139 


211 


378 


400 


21 


42 


75 


130 


196 


352 


450 


19 


39 


70 


122 


184 


-330 


500 


18 


37 


66 


115 


174 


312 



Note: All table entries are rounded to 3 significant digits. 



202 



FUEL PIPING 



Table 12-25 



Table 12-25 

Polyethylene Plastic Pipe [NFPA 54: Table 6.2(s)] 





Gas: 


Natural 


Inlet Pressure: 


Less than 2 psi 


Pressure Drop: 


0.5 in. w.c. 


Specific Gravity: 


0.60 




Pipe Size (in.) 


Nominal OD: 


1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


Designation: 


SDR 9.33 


SDR 11.0 


SDR 11.00 


SDR 10.00 


SDR 11.00 


SDR 11.00 


Actual ID: 


0.660 


0.860 


1.077 


1.328 


1.554 


1.943 


Length (ft) 


Capacity in Cubic Feet of Gas per Hour 


10 


201 


403 


726 


1,260 


1,900 


3,410 


20 


138 


277 


499 


865 


1,310 


2,350 


30 


111 


222 


401 


695 


1,050 


1,880 


40 


95 


190 


343 


594 


898 


1,610 


50 


84 


169 


304 


527 


796 


1,430 


60 


76 


153 


276 


477 


721 


1,300 


70 


70 


140 


254 


439 


663 


1,190 


80 


65 


131 


236 


409 


617 


1,110 


90 


61 


123 


221 


383 


579 


1,040 


100 


58 


116 


209 


362 


547 


983 


125 


51 


103 


185 


321 


485 


871 


150 


46 


93 


168 


291 


439 


789 


175 


43 


86 


154 


268 


404 


726 


200 


40 


80 


144 


249 


376 


675 


250 


35 


71 


127 


221 


333 


598 


300 


32 


64 


115 


200 


302 


542 


350 


29 


59 


106 


184 


278 


499 


400 


27 


55 


99 


171 


258 


464 


450 


26 


51 


93 


160 


242 


435 


500 


24 


48 


88 


152 


229 


411 



Note: All table entries are rounded to 3 significant digits. 



203 



Table 12-26 



UNIFORM PLUMBING CODE 



Table 12-26 

Polyethylene Plastic Pipe [NFPA 54: Table 6.2(t)] 





Gas: 


Natural 


Inlet Pressure: 


2.0 psi 


Pressure Drop: 


1.0 psi 


Specific Gravity: 


0.60 




Pipe Size (in.) 


Nominal OD: 


1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


Designation: 


SDR 9.33 


SDR 11.0 


SDR 11.00 


SDR 10.00 


SDR 11.00 


SDR 11.00 


Actual ID; 


0.660 


0.860 


1.077 


1.328 


1.554 


1.943 


Length (ft) 


Capacity in Cubic Feet of Gas per Hour 


10 


1,860 


3,720 


6,710 


11,600 


17,600 


31,600 


20 


1,280 


2,560 


4,610 


7,990 


12,100 


21,700 


30 


1,030 


2,050 


3,710 


6,420 


9,690 


17,400 


40 


878 


1,760 


3,170 


5,490 


8,300 


14,900 


50 


778 


1,560 


2,810 


4,870 


7,350 


13,200 


60 


705 


1,410 


2,550 


4,410 


6,660 


12,000 


70 


649 


1,300 


2,340 


4,060 


6,130 


11,000 


80 


603 


1,210 


2,180 


3,780 


5,700 


10,200 


90 


566 


1,130 


2,050 


3,540 


5,350 


9,610 


100 


535 


1,070 


1,930 


3,350 


5,050 


9,080 


125 


474 


949 


1,710 


2,970 


4,480 


8,050 


150 


429 


860 


1,550 


2,690 


4,060 


7,290 


175 


395 


791 


1,430 


2,470 


3,730 


6,710 


200 


368 


736 


1,330 


2,300 


3,470 


6,240 


250 


326 


652 


1,180 


2,040 


3,080 


5,530 


300 


295 


591 


1,070 


1,850 


2,790 


5,010 


350 


272 


544 


981 


1,700 


2,570 


4,610 


400 


253 


506 


913 


1,580 


2,390 


4,290 


450 


237 


475 


856 


1,480 


2,240 


4,020 


500 


224 


448 


809 


1,400 


2,120 


3,800 


550 


213 


426 


768 


1,330 


2,010 


3,610 


600 


203 


406 


733 


1,270 


1,920 


3,440 


650 


194 


389 


702 


1,220 


1,840 


3,300 


700 


187 


374 


674 


1,170 


1,760 


3,170 


750 


180 


360 


649 


1,130 


1,700 


3,050 


800 


174 


348 


627 


1,090 


1,640 


2,950 


850 


168 


336 


607 


1,050 


' 1,590 


2,850 


900 


163 


326 


588 


1,020 


1,540 


2,770 


950 


158 


317 


572 


990 


1,500 


2,690 


1,000 


154 


308 


556 


963 


1,450 


2,610 


1,100 


146 


293 


528 


915 


1,380 


2,480 


1,200 


139 


279 


504 


873 


1,320 


2,370 


1,300 


134 


267 


482 


836 


1,260 


2,270 


1,400 


128 


257 


463 


803 


1,210 


2,180 


1,500 


124 


247 


446 


773 


1,170 


2,100 


1,600 


119 


239 


431 


747 


1,130 


2,030 


1,700 


115 


231 


417 


723 


1,090 


1,960 


1,800 


112 


224 


404 


701 


1,060 


1,900 


1,900 


109 


218 


393 


680 


1,030 


1,850 


2,000 


106 


212 


382 


662 


1,000 


1,800 



Note: All table entries are rounded to 3 significant digits. 



204 



FUEL PIPING 



Table 12-27 -Table 12-28 



Table 12-27 

Polyethylene Plastic Tubing [NFPA 54: Table 6.2(u)] 



Table 12-28 

Polyethylene Plastic Tubing [NFPA 54: Table 6.2(v)] 





Gas: 


Natural 


Inlet Pressure: 


Less than 2.0 psi 


Pressure Drop: 


0.3 in. w.c. 


Specific Gravity: 


0.60 


Plastic Tubing Size (CTS)* (in.) 


Nominal OD: 


1/2 


3/4 


Designation: 


SDR 7.00 


SDR 11.00 


Actual ID: 


0.445 


0.927 


Length (ft) 


Capacity in Cubic Feet of Gas per Hour 


10 


54 


372 


20 


37 


256 


30 


30 


205 


40 


26 


176 


50 


23 


156 


60 


21 


141 


70 


19 


130 


80 


18 


121 


90 


17 


113 


100 


16 


107 


125 


14 


95 


150 


13 


86 


175 


12 


79 


200 


11 


74 


225 


10 


69 


250 


NA 


65 


275 


NA 


62 


300 


NA 


59 


350 


NA 


54 


400 


NA 


51 


450 


NA 


47 


500 


NA 


45 





Gas: 


Natural 


Inlet Pressure: 


Less than 2.0 psi 


Pressure Drop: 


0,5 in. w.c. 


Specific Gravity: 


0.60 


Plastic Tubing Size (CTS)* (in.) 


Nominal OD: 


1/2 


3/4 


Designation: 


SDR 7.00 


SDR 11.00 


Actual ID: 


0.445 


0.927 


Length (ft) 


Capacity in Cubic Feet of Gas per Hour 


10 


72 


490 


20 


49 


337 


30 


39 


271 


40 


34 


232 


50 


30 


205 


60 


27 


186 


70 


25 


171 


80 


23 


159 


90 


22 


149 


100 


21 


141 


125 


18 


125 


150 


17 


113 


175 


15 


104 


200 


14 


97 


225 


13 


91 


250 


12 


86 


275 


11 


82 


300 


11 


78 


• 350 


10 


72 


400 


NA 


67 


450 


NA 


63 


500 


NA 


59 



* CTS ~ Copper tube size. 

NA means a flow of less than 10 cfh. 

Note: All table entries are rounded to 3 significant digits. 



* CTS = Copper tube size. 

NA means a flow of less than 10 cfh. 

Note: All table entries are rounded to 3 significant digits 



205 



Table 12-29 



UNIFORM PLUMBING CODE 



Table 12-29 

Schedule 40 Metallic Pipe [NFPA 54-09: Table 6.3(a)] 





Gas: 


Undiluted Propane 


Inlet Pressure: 


10.0 psi 


Pressure Drop: 


1.0 psi 


Specific Gravity: 


1.50 


INTENDED USE: pipe Sizing Between First Stage (High Pressure Regulator) and Second Stage (Low Pressure Regulator). 








Pipe Size (in.) 








Nominal 
Inside: 


1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


Actual: 


0.622 


0.824 


1.049 


1.380 


1.610 


2.067 


2.469 


3.068 


4.026 


Length (ft.) 


Capacity in Thousands of Btu per Hour 


10 


3,320 


6,950 


13,100 


26,900 


40,300 


77,600 


124,000 


219,000 


446,000 


20 


2,280 


4,780 


9,000 


18,500 


27,700 


53,300 


85,000 


150,000 


306,000 


30 


1,830 


3,840 


7,220 


14,800 


22,200 


42,800 


68,200 


121,000 


246,000 


40 


1,570 


3,280 


6,180 


12,700 


•19,000 


36,600 


58,400 


103,000 


211,000 


50 


1,390 


2,910 


5,480 


11,300 


16,900 


32,500 


51,700 


91,500 


187,000 


60 


1,260 


2,640 


4,970 


10,200 


15,300 


29,400 


46,900 


82,900 


169,000 


70 


1,160 


2,430 


4,570 


9,380 


14,100 


27,100 


43,100 


76,300 


156,000 


80 


1,080 


2,260 


4,250 


8,730 


13,100 


25,200 


40,100 


70,900 


145,000 


90 


1,010 


2,120 


3,990 


8,190 


12,300 


23,600 


37,700 


66,600 


136,000 


100 


956 


2,000 


3,770 


7,730 


11,600 


22,300 


35,600 


62,900 


128,000 


125 


848 


1,770 


3,340 


6,850 


10,300 


19,800 


31,500 


55,700 


114,000 


150 


768 


1,610 


3,020 


6,210 


9,300 


17,900 


28,600 


50,500 


103,000 


175 


706 


1,480 


2,780 


5,710 


8,560 


16,500 


26,300 


46,500 


94,700 


200 


657 


1,370 


2,590 


5,320 


7,960 


15,300 


24,400 


43,200 


88,100 


250 


582 


1,220 


2,290 


4,710 


7,060 


13,600 


21,700 


38,300 


78,100 


300 


528 


1,100 


2,080 


4,270 


6,400 


12,300 


19,600 


34,700 


70,800 


350 


486 


1,020 


1,910 


3,930 


5,880 


11,300 


18,100 


31,900 


65,100 


400 


452 


945 


1,780 


3,650 


5,470 


10,500 


16,800 


29,700 


60,600 


450 


424 


886 


1,670 


3,430 


5,140 


9,890 


15,800 


27,900 


56,800 


500 


400 


837 


1,580 


3,240 


4,850 


9,340 


14,900 


26,300 


53,700 


550 


380 


795 


1,500 


3,070 


4,610 


8,870 


14,100 


25,000 


51,000 


600 


363 


759 


1,430 


2,930 


4,400 


8,460 


13,500 


23,900 


48,600 


650 


347 


726 


1,370 


2,810 


4,210 


8,110 


12,900 


22,800 


46,600 


700 


334 


698 


1,310 


2,700 


4,040 


7,790 


12,400 


21,900 


44,800 


750 


321 


672 


1,270 


2,600 


3,900 


7,500 


12,000 


21,100 


43,100 


800 


310 


649 


1,220 


2,510 


3,760 


7,240 


11,500 


20,400 


41,600 


850 


300 


628 


1,180 


2,430 


3,640 


7,010 


11,200 


19,800 


40,300 


900 


291 


609 


1,150 


2,360 


3,530 


6,800 


10,800 


19,200 


39,100 


950 


283 


592 


1,110 


2,290 


3,430 


6,600 


10,500 


18,600 


37,900 


1,000 


275 


575 


1,080 


2,230 


3,330 


6,420 


10,200 


18,100 


36,900 


1,100 


261 


546 


1,030 


2,110 


3,170 


6,100 


9,720 


17,200 


35,000 


1,200 


249 


521 


982 


2,020 


3,020 


5,820 


9,270 


16,400 


33,400 


1,300 


239 


499 


940 


1,930 


2,890 


5,570 


8,880 


15,700 


32,000 


1,400 


229 


480 


903 


1,850 


2,780 


5,350 


8,530 


15,100 


30,800 


1,500 


221 


462 


870 


1,790 


2,680 


5,160 


8,220 


14,500 


29,600 


1,600 


213 


446 


840 


1,730 


2,590 


4,980 


7,940 


14,000 


28,600 


1,700 


206 


432 


813 


1,670 


2,500 


4,820 


7,680 


13,600 


27,700 


1,800 


200 


419 


789 


1,620 


2,430 


4,670 


7,450 


13,200 


26,900 


1,900 


194 


407 


766 


1,570 


2,360 


4,540 


7,230 


12,800 


26,100 


2,000 


189 


395 


745 


1,530 


2,290 


4,410 


7,030 


12,400 


25,400 



Note: All table entries are rounded to 3 significant digits. 



206 



FUEL PIPING 



Table 12-30 



Table 12-30 

Schedule 40 Metallic Pipe [NFPA 54-09: Table 6.3(b)] 





Gas: 


Undiluted Propane 


Inlet Pressure: 


10.0 psi 


Pressure Drop: 


3.0 psi 


Specific Gravity: 


1.50 


). 


Pipe Size (in.) 


Nominal 
Inside: 


1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


Actual: 


0.622 


0.824 


1.049 


1.380 


1.610 


2.067 


2.469 


3.068 


4.026 


Length (ft.) 


Capacity in Thousands of Btu per Hour 


10 


5,890 


12,300 


23,200 


47,600 


71,300 


137,000 


219,000 


387,000 


789,000 


20 


4,050 


8,460 


15,900 


32,700 


49,000 


94,400 


150,000 


266,000 


543,000 


30 


3,250 


6,790 


12,800 


26,300 


39,400 


75,800 


121,000 


214,000 


436,000 


40 


2,780 


5,810 


11,000 


22,500 


33,700 


64,900 


103,000 


183,000 


373,000 


50 


2,460 


5,150 


9,710 


19,900 


29,900 


57,500 


91,600 


162,000 


330,000 


60 


2,230 


4,670 


8,790 


18,100 


27,100 


52,100 


83,000 


147,000 


299,000 


70 


2,050 


4,300 


8,090 


16,600 


24,900 


47,900 


76,400 


135,000 


275,000 


80 


1,910 


4,000 


7,530 


15,500 


23,200 


44,600 


71,100 


126,000 


256,000 


90 


1,790 


3,750 


7,060 


14,500 


21,700 


41,800 


66,700 


118,000 


240,000 


100 


1,690 


3,540 


6,670 


13,700 


20,500 


39,500 


63,000 


111,000 


227,000 


125 


1,500 


3,140 


5,910 


12,100 


18,200 


35,000 


55,800 


98,700 


201,000 


150 


1,360 


2,840 


5,360 


11,000 


16,500 


31,700 


50,600 


89,400 


182,000 


175 


1,250 


2,620 


4,930 


10,100 


15,200 


29,200 


46,500 


82,300 


167,800 


200 


1,160 


2,430 


4,580 


9,410 


14,100 


27,200 


43,300 


76,500 


156,100 


250 


1,030 


2,160 


4,060 


8,340 


12,500 


24,100 


38,400 


67,800 


138,400 


300 


935 


1,950 


3,680 


7,560 


11,300 


21,800 


34,800 


61,500 


125,400 


350 


860 


1,800 


3,390 


6,950 


10,400 


20,100 


32,000 


56,500 


115,300 


400 


800 


1,670 


3,150 


6,470 


9,690 


18,700 


29,800 


52,600 


107,300 


450 


751 


1,570 


2,960 


6,070 


9,090 


17,500 


27,900 


49,400 


100,700 


500 


709 


1,480 


2,790 


5,730 


8,590 


16,500 


26,400 


46,600 


95,100 


550 


673 


1,410 


2,650 


5,450 


8,160 


15,700 


25,000 


44,300 


90,300 


600 


642 


1,340 


2,530 


5,200 


7,780 


15,000 


23,900 


42,200 


86,200 


650 


615 


1,290 


2,420 


4,980 


7,450 


14,400 


22,900 


40,500 


82,500 


700 


591 


1,240 


2,330 


4,780 


7,160 


13,800 


22,000 


38,900 


79,300 


750 


569 


1,190 


2,240 


4,600 


6,900 


13,300 


21,200 


37,400 


76,400 


800 


550 


1,150 


2,170 


4,450 


6,660 


12,800 


20,500 


36,200 


73,700 


850 


532 


1,110 


2,100 


4,300 


6,450 


12,400 


19,800 


35,000 


71,400 


900 


516 


1,080 


2,030 


4,170 


6,250 


12,000 


19,200 


33,900 


69,200 


950 


501 


1,050 


1,970 


4,050 


6,070 


11,700 


18,600 


32,900 


67,200 


1,000 


487 


1,020 


1,920 


3,940 


5,900 


11,400 


18,100 


32,000 


65,400 


1,100 


463 


968 


1,820 


3,740 


5,610 


10,800 


17,200 


30,400 


62,100 


1,200 


442 


923 


1,740 


3,570 


5,350 


10,300 


16,400 


29,000 


59,200 


1,300 


423 


884 


1,670 


3,420 


5,120 


9,870 


15,700 


27,800 


56,700 


1,400 


406 


849 


1,600 


3,280 


4,920 


9,480 


15,100 


26,700 


54,500 


1,500 


391 


818 


1,540 


3,160 


4,740 


9,130 


14,600 


25,700 


52,500 


1,600 


378 


790 


1,490 


3,060 


4,580 


8,820 


14,100 


24,800 


50,700 


1,700 


366 


765 


1,440 


2,960 


4,430 


8,530 


13,600 


24,000 


49,000 


1,800 


355 


741 


1,400 


2,870 


4,300 


8,270 


13,200 


23,300 


47,600 


1,900 


344 


720 


1,360 


2,780 


4,170 


8,040 


12,800 


22,600 


46,200 


2,000 


335 


700 


1,320 


2,710 


4,060 


7,820 


12,500 


22,000 


44,900 



Note: All table entries are rounded to 3 significant digits. 



207 



Table 12-31 



UNIFORM PLUMBING CODE 



Table 12-31 

Schedule 40 Metallic Pipe [NFPA 54-09: Table 6.3(c)] 















Gas: 


Undiluted Propane 






Inlet Pressure: 


2.0 psi 


Pressure Drop: 


1.0 psi 


Specific Gravity: 


1.50 


INTENDED USE: Pipe Sizing Between 2 psi Service and Line Pressure Regulator 


Pipe Size (in.) 


Nominal 


1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


Actual ID: 


0.622 


0.824 


1.049 


1.380 


1.610 


2.067 


2.469 


3.068 


4.026 


Length (ft.) 


Capacity in Thousands of Btu per Hour 


10 


2,680 


5,590 


10,500 


21,600 


32,400 


62,400 


99,500 


176,000 


359,000 


20 


1,840 


3,850 


7,240 


14,900 


22,300 


42,900 


68,400 


121,000 


247,000 


30 


1,480 


3,090 


5,820 


11,900 


17,900 


34,500 


54,900 


97,100 


198,000 


40 


1,260 


2,640 


4,980 


10,200 


15,300 


29,500 


47,000 


83,100 


170,000 


50 


1,120 


2,340 


4,410 


9,060 


13,600 


26,100 


41,700 


73,700 


150,000 


60 


1,010 


2,120 


4,000 


8,210 


12,300 


23,700 


37,700 


66,700 


136,000 


70 


934 


1,950 


3,680 


7,550 


11,300 


21,800 


34,700 


61,400 


125,000 


80 


869 


1,820 


3,420 


7,020 


10,500 


20,300 


32,300 


57,100 


116,000 


90 


815 


1,700 


3,210 


6,590 


9,880 


19,000 


30,300 


53,600 


109,000 


100 


770 


1,610 


3,030 


6,230 


9,330 


18,000 


28,600 


50,600 


103,000 


125 


682 


1,430 


2,690 


5,520 


8,270 


15,900 


25,400 


44,900 


91,500 


150 


618 


1,290 


2,440 


5,000 


7,490 


14,400 


23,000 


40,700 


82,900 


175 


569 


1,190 


2,240 


4,600 


6,890 


13,300 


21,200 


37,400 


76,300 


200 


529 


1,110 


2,080 


4,280 


6,410 


12,300 


19,700 


34,800 


71,000 


250 


469 


981 


1,850 


3,790 


5,680 


10,900 


17,400 


30,800 


62,900 


300 


425 


889 


1,670 


3,440 


5,150 - 


9,920 


15,800 


27,900 


57,000 


350 


391 


817 


1,540 


3,160 


4,740 


9,120 


14,500 


25,700 


52,400 


400 


364 


760 


1,430 


2,940 


4,410 


8,490 


13,500 


23,900 


48,800 


450 


341 


714 


1,340 


2,760 


4,130 


7,960 . 


12,700 


22,400 


45,800 


500 


322 


674 


1,270 


2,610 


3,910 


7,520 


12,000 


21,200 


43,200 


550 


306 


640 


1,210 


2,480 


3,710 


7,140 


1 1,400 


20,100 


41,100 


600 


292 


611 


1,150 


2,360 


3,540 


6,820 


10,900 


19,200 


39,200 


650 


280 


585 


1,100 


2,260 


3,390 


6,530 


10,400 


18,400 


37,500 


700 


269 


562 


1,060 


2,170 


3,260 


6,270 


9,990 


17,700 


36,000 


750 


259 


541 


1,020 


2,090 


3,140 


6,040 


9,630 


17,000 


34,700 


800 


250 


523 


985 


2,020 


3,030 


5,830 


9,300 


16,400 


33,500 


850 


242 


506 


953 


1,960 


2,930 


5,640 


9,000 


15,900 


32,400 


900 


235 


490 


924 


1,900 


2,840 


5,470 


8,720 


15,400 


31,500 


950 


228 


476 


897 


1,840 


2,760 


5,310 


8,470 


15,000 


30,500 


1,000 


222 


463 


873 


1,790 


2,680 


5,170 


8,240 


14,600 


29,700 


1,100 


210 


440 


829 


1,700 


2,550 


4,910 


7,830 


13,800 


28,200 


1,200 


201 


420 


791 


1,620 


2,430 


4,680 


7,470 


13,200 


26,900 


1,300 


192 


402 


757 


1,550 


2,330 


4,490 


7,150 


12,600 


25,800 


1,400 


185 


386 


727 


1,490 


2,240 


4,310 


6,870 


12,100 


24,800 


1,500 


178 


372 


701 


1,440 


2,160 


4,150 


6,620 


11,700 


23,900 


1,600 


172 


359 


677 


1,390 


2,080 


4,010 


6,390 


11,300 


23,000 


1,700 


166. 


348 


655 


1,340 


2,010 


3,880 


6,180 


10,900 


22,300 


1,800 


161 


337 


635 


1,300 


1,950 


3,760 


6,000 


10,600 


21,600 


1,900 


157 


327 


617 


1,270 


1,900 


3,650 


5,820 


10,300 


21,000 


2,000 


152 


318 


600 


1,230 


1,840 


3,550 


5,660 


10,000 


20,400 



Note: All table entries are rounded to 3 significant digits. 



208 



FUEL PIPING 



Table 12-32 



Table 12-32 

Schedule 40 Metallic Pipe [NFPA 54-09: Table 6.3(d)] 





Gas: 


Undiluted Propane 


Inlet Pressure: 


11.0 in. w.c. 


Pressure Drop: 


0.5 in. w.c. 


Specific Gravity: 


1.50 




INTENDED USE: Pipe Sizing Between 


Single or Second Stage (Low Pressure Regulator) and Appliance 


Pipe Size (in.) 


Nominal 
Inside: 


1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


Actual ID: 


0.622 


0.824 


1.049 


1.380 


1.610 


2.067 


2.469 


3.068 


4.026 


Length (ft.) 


Capacity in Thousands of Btu per Hour 


10 


291 


608 


1,150 


2,350 


3,520 


6,790 


10,800 


19,100 


39,000 


20 


200 


418 


787 


1,620 


2,420 


4,660 


7,430 


13,100 


26,800 


30 


160 


336 


632 


1,300 


1,940 


3,750 


5,970 


10,600 


21,500 


40 


137 


287 


541 


1,110 


1,660 


3,210 


5,110 


9,030 


18,400 


50 


122 


255 


480 


985 


1,480 


2,840 


4,530 


8,000 


16,300 


60 


110 


231 


434 


892 


1,340 


2,570 


4,100 


7,250 


14,800 


80 


101 


212 


400 


821 


1,230 


2,370 


3,770 


6,670 


13,600 


100 


94 


197 


372 


763 


1,140 


2,200 


3,510 


6,210 


12,700 


125 


89 


185 


349 


716 


1,070 


2,070 


3,290 


5,820 


11,900 


150 


84 


175 


330 


677 


1,010 


1,950 


3,110 


5,500 


11,200 


175 


74 


155 


292 


600 


899 


1,730 


2,760 


4,880 


9,950 


■ 200 


67 


140 


265 


543 


814 


1,570 


2,500 


4,420 


9,010 


250 


62 


129 


243 


500 


749 


1,440 


2,300 


4,060 


8,290 


300 


58 


120 


227 


465 


697 


1,340 


2,140 


3,780 


7,710 


350 


51 


107 


201 


412 


618 


1,190 


1,900 


3,350 


6,840 


400 


46 


97 


182 


373 


560 


1,080 


1,720 


3,040 


6,190 


450 


42 


89 


167 


344 


515 


991 


1,580 


2,790 


5,700 


500 


40 


83 


156 


320 


479 


922 


1,470 


2,600 


5,300 


550 


37 


78 


146 


300 


449 


865 


1,380 


2,440 


4,970 


600 


35 


73 


138 


283 


424 


817 


1,300 


2,300 


4,700 


650 


33 


70 


131 


269 


403 


776 


1,240 


2,190 


4,460 


700 


32 


66 


125 


257 


385 


741 


1,180 


2,090 


4,260 


750 


30 


64 


120 


246 


368 


709 


1,130 


2,000 


4,080 


800 


29 


61 


115 


236 


354 


681 


1,090 


1,920 


3,920 


850 


28 


59 


111 


227 


341 


656 


1,050 


1,850 


3,770 


900 


27 


57 


107 


220 


329 


634 


1,010 


1,790 


3,640 


950 


26 


55 


104 


213 


319 


613 


978 


1,730 


3,530 


1,000 


25 


53 


100 


206 


309 


595 


948 


1,680 


3,420 


1,100 


25 


52 


97 


200 


300 


578 


921 


1,630 


3,320 


1,200 


24 


50 


95 


195 


292 


562 


895 


1,580 


3,230 


1,300 


23 


48 


90 


185 


277 


534 


850 


1,500 


3,070 


1,400 


22 


46 


86 


176 


264 


509 


811 


1,430 


2,930 


1,500 


21 


44 


82 


169 


253 


487 


777 


1,370 


2,800 


1,600 


20 


42 


79 


162 


243 


468 


746 


1,320 


2,690 


1,700 


19 


40 


76 


156 


234 


451 


719 


1,270 


2,590 


1,800 


19 


39 


74 


151 


226 


436 


694 


1,230 


2,500 


1,900 


18 


38 


71 


146 


219 


422 


672 


1,190 


2,420 


2,000 


18 


37 


69 


1.42 


212 


409 


652 


1,150 


2,350 



Note: All table entries are rounded to 3 significant digits. 



209 



Table 12-33 



UNIFORM PLUMBING CODE 



Table 12-33 

Semi-Rigid Copper Tubing [NFPA 54-09: Table 6.3(e)] 

















Gas: 


Undiluted Propane 






Inlet Pressure: 


10.0 psi 


Pressure Drop: 


1.0 psi 


Specific Gravity: 


1.50 


INTENDED USE; Tube Sizing Between First Stage (High Pressure) Regulator and Second Stage (tow Pressure) Regulator. 








Tube Size (in.) 








K&L: 


1/4 


3/8 


1/2 


5/8 


3/4 


1 


1-1/4 


1-1/2 


2 


























ACR: 


3/8 


1/2 


5/8 


3/4 


7/8 


1-1/8 


1-3/8 


- 


- 


Outside: 


0.375 


0.500 


0.625 


0.750 


0.875 


1.125 


1.375 


1.625 


2.125 


Inside:* 


0.305 


0.402 


0.527 


0.652 


0.745 


0.995 


1.245 


1.481 


1.959 


Length (ft.) 


Capacity in Thousands of Btu per Hour 


10 


513 


1,060 


2,150 


3,760 


5,330 


11,400 


20,500 


32,300 


67,400 


20 


352 


727 


1,480 


2,580 


3,670 


7,830 


14,100 


22,200 


46,300 


30 


283 


584 


1,190 


2,080 


2,940 


6,290 


11,300 


17,900 


37,200 


40 


242 


500 


1,020 


1,780 


2,520 


5,380 


9,690 


15,300 


31,800 


50 


215 


443 


901 


1,570 


2,230 


4,770 


8,590 


13,500 


28,200 


60 


194 


401 


816 


1,430 


2,020 


4,320 


7,780 


12,300 


25,600 


70 


179 


369 


751 


1,310 


1,860 


3,980 


7,160 


11,300 


23,500 


80 


166 


343 


699 


1,220 


1,730 


3,700 


6,660 


10,500 


21,900 


90 


156 


322 


655 


1,150 


1,630 


3,470 


6,250 


9,850 


20,500 


100 


147 


304 


619 


1,080 


1,540 


3,280 


5,900 


9,310 


19,400 


125 


131 


270 


549 


959 


1,360 


2,910 


5,230 


8,250 


17,200 


150 


118 


244 


497 


869 


1,230 


2,630 


4,740 


7,470 


15,600 


175 


109 


225 


457 


799 


1,130 


2,420 


4,360 


6,880 


14,300 


200 


101 


209 


426 


744 


1,060 


2,250 


4,060 


6,400 


13,300 


250 


90 


185 


377 


659 


935 


2,000 


3,600 


5,670 


11,800 


300 


81 


168 


342 


597 


847 


1,810 


3,260 


5,140 


10,700 


350 


75 


155 


314 


549 


779 


1,660 


3,000 


4,730 


9,840 


400 


70 


144 


292 


511 


725 


1,550 


2,790 


4,400 


9,160 


450 


65 


135 


274 


480 


680 


1,450 


2,620 


4,130 


8,590 


500 


62 


127 


259 


453 


643 


1,370 


2,470 


3,900 


8,120 


550 


59 


121 


246 


430 


610 


1,300 


2,350 


3,700 


7,710 


600 


56 


115 


235 


410 


582 


1,240 


2,240 


3,530 


7,350 


650 


54 


111 


225 


393 


558 


1,190 


2,140 


3,380 


7,040 


700 


51 


106 


216 


378 


536 


1,140 


2,060 


3,250 


6,770 


750 


50 


102 


208 


364 


516 


1,100 


1,980 


3,130 


6,520 


800 


48 


99 


201 


351 


498 


1,060 


1,920 


3,020 


6,290 


850 


46 


96 


195 


340 


482 


1,030 


1,850 


2,920 


6,090 


900 


45 


93 


189 


330 


468 


1,000 


1,800 


2,840 


5,910 


950 


44 


90 


183 


320 


454 


970 


1,750 


2,750 


5,730 


1,000 


42 


88 


178 


311 


442 


944 


1,700 


2,680 


5,580 


1J.00 


40 


83 


169 


296 


420 


896 


1,610 


2,540 


5,300 


1,200 


38 


7 9 


161 


282 


400 


855 


1,540 


2,430 


5,050 


1,300 


37 


76 


155 


270 


383 


819 


1,470 


2,320 


4,840 


1,400 


35 


73 


148 


260 


368 


787 


1,420 


2,230 


4,650 


1,500 


34 


70 


143 


250 


355 


758 


1,360 


2,150 


4,480 


1,600 


33 


68 


138 


241 


343 


732 


1,320 


2,080 


4,330 


1,700 


32 


66 


134 


234 


331 


708 


1,270 


2,010 


4,190 


1,800 


31 


64 


130 


227 


321 


687 


1,240 


1,950 


4,060 


1,900 


30 


62 


126 


220 312 


667 


1,200 


1,890 


3,940 


2,000 


29 


60 


122 


214 304 


648 


1,170 


1,840 


3,830 



Note: All table entries are rounded to 3 significant digits. 

*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products. 



210 



FUEL PIPING 



Table 12-34 



Table 12-34 

Semi-Rigid Copper Tubing [NFPA 54-09: Table 6.3(f)] 

















Gas: 


Undiluted Propane 






Inlet Pressure: 


11.0 in. w.c. 


Pressure Drop: 


0.5 in. w.c. 


Specific Gravity: 


1.50 


INTENDED USE: Tube Sizing Between Single or Second Stage (Low Pressure Regulator) and Appliance. 


Tube Size (in.) 


Nominal: 


K&L: 


1/4 


3/8 


1/2 


5/8 


3/4 


1 


1-1/4 


1-1/2 


2 


ACR: 


3/8 


1/2 


5/8 


3/4 


7/8 


1-1/8 


1-3/8 


- 


- 


Outside: 


0.375 


0.500 


0.625 


0.750 


0.875 


1.125 


1.375 


1.625 


2.125 


Inside:* 


0.305 


0.402 


0.527 


0.652 


0.745 


0.995 


1.245 


1.481 


1.959 


Length (ft.) 


Capacity in Thousands of Btu per Hour 


10 


45 


93 


188 


329 


467 


997 


1,800 


2,830 


5,890 


20 


31 


64 


129 


226 


321 


685 


1,230 


1,950 


4,050 


30 


25 


51 


104 


. 182 


258 


550 


991 


1,560 


3,250 


4.0 


21 


44 


89 


155 


220 


471 


848 


1,340 


2,780 


50 


19 


39 


79 


138 


195 


417 


752 


1,180 


2,470 


60 


17 


35 


71 


125 


177 


378 


681 


1,070 


2,240 


70 


16 


32 


66 


115 


163 


348 


626 


988 


2,060 


80 


15 


30 


61 


107 


152 


324 


583 


919 


1,910 


90 


14 


28 


57 


100 


142 


304 


547 


862 


1,800 


100 


13 


27 


54 


95 


134 


287 


517 


814 


1,700 


125 


11 


24 


48 


84 


119 


254 


458 


722 


1,500 


150 


10 


21 


44 


76 


108 


230 . 


415 


654 


1,360 


175 


NA 


20 


40 


70 


99 


212 


382 


602 


1,250 


200 


NA 


18 


37 


65 


92 


197 


355 


560 


1,170 


250 


NA 


16 


33 


58 


82 


175 


315 


496 


1,030 


300 


NA 


15 


30 


52 


74 


158 


285 


449 


936 


350 


NA 


14 


28 


48 


68 


146 


262 


414 


861 


400 


NA 


13 


26 


45 


63 


136 


244 


385 


801 


450 


NA 


12 


24 


42 


60 


127 


229 


361 


752 


500 


NA 


11 


23 


40 


56 


120 


216 


341 


710 


550 


NA 


11 


22 


38 


53 


114 


205 


324 


674 


600 


NA 


10 


21 


36 


51 


109 


196 


309 


643 


650 


NA 


NA 


20 


34 


49 


104 


188 


296 


616 


700 


NA 


NA 


19 


33 


47 


100 


180 


284 


592 


750 


NA 


NA 


18 


32 


45 


96 


174 


274 


570 


800 


NA 


NA 


18 * 


31 


44 


93 


168 


264 


551 


850 


NA 


NA 


17 


30 


42 


90 


162 


256 


533 


900 


NA 


NA 


17 


29 


41 


87 


157 


248 


517 


950 


NA 


NA 


16 


28 


40 


85 


153 


241 


502 


1,000 


NA 


NA 


16 


27 


39 


83 


149 


234 


488 


1,100 


NA 


NA 


15 


26 


37 


78 


141 


223 


464 


1,200 


NA 


NA 


14 


25 


35 


75 


135 


212 


442 


1,300 


NA 


NA 


14 


24 


34 


72 


129 


203 


423 


1,400 


NA 


NA 


13 


23 


32 


69 


124 


195 


407 


1,500 


NA 


NA 


13 


22 


31 


66 


119 


188 


392 


1,600 


NA 


NA- 


12 


21 


30 


64 


115 


182 


378 


1,700 


NA 


NA 


12 


20 


29 


62 


112 


176 


366 


1,800 


NA 


NA 


11 


20 


28 


60 


108 


170 


355 


1,900 


NA 


NA 


11 


19 


27 


58 


105 


166 


345 


2,000 


NA 


NA 


11 


19 


27 


57 


102 


161 


335 



NA means a flow of less than 10,000 Btu/hr. 

Note: All table entries are rounded to 3 significant digits. 

*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products. 



211 



Table 12-35 



UNIFORM PLUMBING CODE 



Table 12-35 

Semi-Rigid Copper Tubing [NFPA 54-09: Table 6.3(g)] 

















Gas: 


Undiluted Propane 






Inlet Pressure: 


2.0 psi 


Pressure Drop: 


1.0 psi 


Specific Gravity: 


1.50 




INTENDED USE. Tube Sizing Between 2 p$i# Service and 


Line Pressure Regulator 






Tube Size (in.) 




K&L: 


1/4 


3/8 


1/2 


5/8 


3/4 


1 


1-1/4 


1-1/2 


2 


























ACR: 


3/8 


1/2 


5/8 


3/4 


7/8 


1-1/8 


1-3/8 


- 


- 


Outside: 


0.375 


0.500 


0.625 


0.750 


0.875 


1.125 


1.375 


1.625 


2.125 


Inside:* 


0.305 


0.402 


0.527 


0.652 


0.745 


0.995 


1.245 


1.481 


1.959 


Length (ft.) 


Capacity in Thousands of Btu per Hour 


10 


413 


852 


1,730 


3,030 


4,300 


9,170 


16,500 


26,000 


54,200 


20 


284 


585 


1,190 


2,080 


2,950 


6,310 


11,400 


17,900 


37,300 


30 


228 


470 


956 


1,670 


2,370 


5,060 


9,120 


14,400 


29,900 


40 


195 


402 


818 


1,430 


2,030 


4,330 


7,800 


12,300 


25,600 


50 


173 


356 


725 


1,270 


1,800 


3,840 


6,920 


10,900 


22,700 


60 


157 


323 


657 


1,150 


1,630 


3,480 


6,270 


9,880 


20,600 


70 


144 


297 


605 


1,060 


1,500 


3,200 


5,760 


9,090 


18,900 


80 


134 


276 


562 


983 


1,390 


2,980 


5,360 


8,450 


17,600 


90 


126 


259 


528 


922 


1,310 


2,790 


5,030 


7,930 


16,500 


1.00 


119 


245 


498 


871 


1,240 


2,640 


4,750 


7,490 


15,600 


125 


105 


217 


442 


772 


1,100 


2,340 


4,210 


6,640 


13,800 


150 


95 


197 


400 


700 


992 


2,120 


3,820 


6,020 


12,500 


175 


88 


181 


368 


644 


913 


1,950 


3,510 


5,540 


11,500 


200 


82 


168 


343 


599 


849 


1,810 


3,270 


5,150 


10,700 


250 


72 


149 


304 


531 


753 


1,61.0 


2,900 


4,560 


9,510 


300 


66 


135 


275 


481 


682 


1,460 


2,620 


4,140 


8,610 


350 


60 


124 


253 


442 


628 


1,340 


2,410 


3,800 


7,920 


400 


56 


116 


235 


411 


584 


1,250 


2,250 


3,540 


7,370 


450 


53 


109 


221 


386 


548 


1,170 


2,110 


3,320 


6,920 


500 


50 


103 


209 


365 


517 


1,110 


1,990 


3,140 


6,530 


550 


47 


97 


198 


346 


491 


1,050 


1,890 


2,980 


6,210 


600 


45 


93 


189 


330 


469 


1,000 


1,800 


2,840 


5,920 


650 


43 


89 


181 


316 


449 


959 


1,730 


2,720 


5,670 


700 


41 


86 


174 


304 


431 


921 


1,660 


2,620 


5,450 


750 


40 


82 


168 


293 


415 


888 


1,600 


2,520 


5,250 


800 


39 


80 


162 


283 


401 


857 


1,540 


2,430 


5,070 


850 


37 


77 


157 


274 


388 


829 


1,490 


2,350 


4,900 


900 


36 


75 


152 


265 


376 


804 


1,450 


2,280 


4,750 


950 


35 


72 


147 


258 


366 


781 


1,410 


2,220 


4,620 


1,000 


34 


71 


143 


251 


356 


760 


1,370 


2,160 


4,490 


1,100 


32 


67 


136 


238 


338 


721 


1,300 


2,050 


4,270 


1,200 


31 


64 


130 


227 


322 


688 


1,240 


1,950 


4,070 


1,300 


30 


61 


124 


217 


309 


659 


1,190 


1,870 


3,900 


1,400 


28 


59 


120 


209 


296 


633 


1,140 


1,800 


3,740 


1,500 


27 


57 


115 


201 


286 


610 


1,100 


1,730 


3,610 


1,600 


26 


55 


111 


194 


276 


589 


1,060 


1,670 


3,480 


1,700 


26 


53 


108 


188 


267 


570 


1,030 


1,620 


3,370 


1,800 


25 


51 


104 


182 


259 


553 


1,000 


1,570 


3,270 


1,900 


24 


50 


101 


177 


251 


537 


966 


1,520 


3,170 


2,000 


23 


48 


99 


172 


244 


522 


940 


1,480 


3,090 



Note: All table entries are rounded to 3 significant digits. 

*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products. 



212 



FUEL PIPING 



Table 12-36 -Table 12-37 



Table 12-36 

Corrugated Stainless Steel Tubing (CSST) [NFPA 54-09: Table 6.3(h)] 





Gas: 


Undiluted Propane 


Inlet Pressure: 


11.0 in. w.c. 


Pressure Drop: 


0.5 in w.c. 


Specific Gravity: 


1.50 


INTENDED USE: CSST Sizing 


Between Single 


or Second Stage (Low Pressure) Regulator and Appliance Shutoff Valve 






Tube Size (EHD)* 


Flow Designation: 


13 


15 


18 


19 


23 


25 | 30 | 31 37 39 


46 1 48 


60 


62 


Length (ft) 


Capacity in Thousands of Btu per Hour 


5 


72 


99 


181 


211 


355 


426 


744 


863 


1,420 


1,638 


2,830 


3,270 


5,780 


6,550 


10 


50 


69 


129 


1.50 


254 


303 


521 


605 


971 


1,179 


1,990 


2,320 


4,110 


4,640 


15 


39 


55 


104 


121 


208 


248 


422 


490 


775 


972 


1,620 


1,900 


3,370 


3,790 


20 


34 


49 


91 


106 


183 


216 


365 


425 


661 


847 


1,400 


1,650 


2,930 


3,290 


25 


30 


42 


82 


94 


164 


192 


325 


379 


583 


762 


1,250 


1,480 


2,630 


2,940 


30 


28 


39 


74 


87 


151 


177 


297 


344 


528 


698 


1,140 


1,350 


2,400 


2,680 


40 


23 


33 


64 


74 


131 


153 


256 


297 


449 


610 


988 


1,170 


2,090 


2,330 


50 


20 


30 


58 


66 


118 


137 


227 


265 


397 


548 


884 


1,050 


1,870 


2,080 


60 


19 


26 


53 


60 


107 


126 


207 


241 


359 


502 


805 


961 


1,710 


1,900 


70 


17 


25 


49 


57 


99 


117 


191 


222 


330 


466 


' 745 


890 


1,590 


1,760 


80 


15 


23 


45 


52 


94 


109 


178 


208 


307 


438 


696 


833 


1,490 


1,650 


90 


15 


22 


44 


50 


90 


102 


169 


197 


286 


414 


656 


787 


1,400 


1,550 


100 


14 


20 


41 


47 


85 


98 


159 


186 


270 


393 


621 


746 


1,330 


1,480 


150 


11 


15 


31 


36 


66 


75 


123 


143 


217 


324 


506 


611 


1,090 


1,210 


200 


9 


14 


28 


33 


60 


69 


112 


129 


183 


283 


438 


531 


948 


1,050 


250 


8 


12 


25 


30 


53 


61 


99 


117 


163 


254 


390 


476 


850 


934 


300 


8 


11 


23 


26 


50 


57 


90 


107 


147 


234 


357 


434 


777 


854 



*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of 

EHD, the greater the gas capacity of the tubing. 

Notes: 

(1) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbers of bends and /or fittings shall be increased 
by an equivalent length of tubing to the following equation: L - 1.3??, where I is additional length (ft) of tubing and n is the number of additional 
fittings and / or bends. 

(2) All table entries are rounded to 3 significant digits. 

Table 12-37 

Corrugated Stainless Steel Tubing (CSST) [NFPA 54-09: Table 6.3(i)] 





Gas: 


Undiluted Propane 


Inlet Pressure: 


2.0 psi 


Pressure Drop: 


1 .0 psi 


Specific Gravity: 


1.50 


INTENDED USE: CSST Sizing Between 2 psi Service and Line Pressure Regulator 




Tube Size (EHD)* 


Flow Designation: 


13 


15 


18 


19 


23 


25 


30 | 31 | 37 


39 


46 1 48 


60 


62 


Length (ft) 


Capacity in Thousands of Btu per Hour 


10 


426 


558 


927 


1,110 


1,740 


2,170 


4,100 


4,720 


7,130 


7,958 


15,200 


16,800 


29,400 


34,200 


25 


262 


347 


591 


701 


1,120 


1,380 


2,560 


2,950 


4,560 


5,147 


9,550 


10,700 


18,800 


21,700 


30 


238 


316 


540 


640 


1,030 


1,270 


2,330 


2,690 


4,180 


4,719 


8,710 


9,790 


17,200 


19,800 


40 


203 


271 


469 


554 


896 


1,100 


2,010 


2,320 


3,630 


4,116 


7,530 


8,500 


14,900 


17,200 


50 


181 


243 


420 


496 


806 


986 


1,790 


2,070 


3,260 


3,702 


6,730 


7,610 


13,400 


15,400 


75 


147 


196 


344 


406 


663 


809 


1,460 


1,690 


2,680 


3,053 


5,480 


6,230 


11,000 


12,600 


80 


140 


189 


333 


393 


643 


768 


1,410 


1,630 


2,590 


2,961 


5,300 


6,040 


10,600 


12,200 


100 


124 


169 


298 


350 


578 


703 


1,260 


1,450 


2,330 


2,662 


4,740 


5,410 


9,530 


10,900 


150 


101 


137 


245 


287 


477 


575 


1,020 


1,180 


1,910 


2,195 


3,860 


4,430 


7,810 


8,890 


200 


86 


118 


213 


248 


415 


501 


880 


1,020 


1,660 


1,915 


3,340 


3,840 


6,780 


7,71.0 


250 


77 


105 


191 


222 


373 


448 


785 


910 


1,490 


1,722 


2,980 


3,440 


6,080 


6,900 


300 


69 


96 


173 


203 


343 


411 


716 


829 


1,360 


1,578 


2,720 


3,150 


5,560 


6,300 


400 


60 


82 


151 


175 


298 


355 


616 


716 


1,160 


1,376 


2,350 


2,730 


4,830 


5,460 


500 


53 


72 


135 


158 


268 


319 


550 


638 


1,030 


1,237 


2,100 


2,450 


4,330 


4,880 



*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of 

EHD, the greater the gas capacity of the tubing. 

Notes: 

(1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 1 /2 psi (based on 13 in. w.c. outlet pressure), 
DO NOT USE THIS TABLE. Consult with regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator may 
vary with flow rate. 

(2) CAUTION: Capacities shown in table may exceed maximum capacity for a selected regulator. Consult with regulator or tubing manufacturer for guidance. 

(3) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbers of bends and /or fittings shall be increased by an 
equivalent length of tubing to the following equation: L = 1.3;i, where L is additional length (ft) of tubing and n is the number of additional fittings 
and /or bends. 

(4) All table entries are rounded to 3 significant digits. 



213 



Table 12-38 -Table 12-39 



UNIFORM PLUMBING CODE 



Table 12-38 

Corrugated Stainless Steel Tubing (CSST) [NFPA 54-09: Table 6.3(j)] 





Gas: 


Undiluted Propane 


Inlet Pressure: 


5.0 psi 


Pressure Drop: 


3.5 psi 


Specific Gravity: 


1.50 




Tube Size (EHD)* 


Flow Designation: 


13 


15 


18 


19 


23 


25 


30 


31 


37 


39 


46 | 48 


60 


62 


Length (ft) 












Capacity in Thousands of Btu per 


Hour 








10 


826 


1,070 


1,710 


2,060 


3,150 


4,000 


7,830 


8,950 


13,100 


14,444 


28,600 


31,200 


54,400 


63,800 


25 


509 


664 


1,090 


1,310 


2,040 


2,550 


4,860 


5,600 


8,400 


9,339 


18,000 


19,900 


34,700 


40,400 


30 


461 


603 


999 


1,190 


1,870 


2,340 


4,430 


5,100 


7,680 


8,564 


16,400 


18,200 


31,700 


36,900 


40 


396 


520 


867 


1,030 


1,630 


2,030 


3,820 


4,400 


6,680 


7,469 


14,200 


15,800 


27,600 


32,000 


50 


352 


463 


777 


926 


1,460 


1,820 


3,410 


3,930 


5,990 


6,717 


12,700 


14,100 


24,700 


28,600 


75 


284 


376 


637 


757 


1,210 


1,490 


2,770 


3,190 


4,920 


5,539 


10,300 


11,600 


20,300 


23,400 


80 


275 


363 


618 


731 


1,170 


1,450 


2,680 


3,090 


4,770 


5,372 


9,990 


11,200 


19,600 


22,700 


100 


243 


324 


553 


656 


1,050 


1,300 


2,390 


2,760 


4,280 


4,830 


8,930 


10,000 


17,600 


20,300 


150 


196 


262 


453 


535 


866 


1,060 


1,940 


2,240 


3,510 


3,983 


7,270 


8,210 


14,400 


16,600 


200 


169 


226 


393 


464 


755 


923 


1,680 


1,930 


3,050 


3,474 


6,290 


7,130 


12,500 


14,400 


250 


150 


202 


352 


415 


679 


828 


1,490 


1,730 


2,740 


3,124 


5,620 


6,390 


11,200 


12,900 


300 


136 


183 


322 


379 


622 


757 


1,360 


1,570 


2,510 


2,865 


5,120 


5,840 


10,300 


11,700 


400 


117 


158 


279 


328 


542 


657 


1,170 


1,360 


2,180 


2,498 


4,430 


5,070 


8,920 


10,200 


500 


104 


140 


251 


294 


488 


589 


1,050 


1,210 


1,950 


2,247 


3,960 


4,540 


8,000 


9,110 



*£HD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of 
EHD, the greater the gas capacity of the tubing- 
Notes: 

(1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 1 psi, do not use this table. Consult with regu- 
lator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator may vary with flow rate. 

(2) CAUTION: Capacities shown in table may exceed maximum capacity for a selected regulator. Consult with regulator or tubing manufacturer for 
guidance. 

(3) '[able includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbers of bends and /or fittings shall be increased by an 
equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings 
and /or bends, 

(4) All table entries are rounded to 3 significant digits. 

Table 12-39 

Polyethylene Plastic Pipe [NFPA 54-09: Table 6.3(k)] 





Gas: 


Undiluted Propane 


Inlet Pressure: 


11.0 in. w.c. 


Pressure Drop: 


0.5 in. w.c. 


Specific Gravity: 


1.50 


INTENDED USE: PE Sizing Between Integra! 2-Stage, Regulator at Tank or 2nd Stage (Low Pressure Regulator) and Building 




Pipe Size (in.) 


Nominal OD: 


1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


Designation: 


SDR 9.33 


SDR 11.0 


SDR 11.00 


SDR 10.00 


SDR 11.00 


SDR 11.00 


Actual ID: 


0.660 


0.860 


1.077 


1.328 


1.554 


1.943 


Length (ft) 


Capacity in Thousands of Btu per Hour 


10 


340 


680 


1,230 


2,130 


3,210 


5,770 


20 


233 


468 


844 


1,460 


2,210 


3,970 


30 


187 


375 


677 


1,170 


1,770 


3,180 


40 


160 


321 


580 


1,000 


1,520 


2,730 


50 


142 


285 


514 


890 


1,340 


2,420 


60 


129 


258 


466 


807 


1,220 


2,190 


70 


119 


237 


428 


742 


1,120 


2,010 


80 


no 


221 


398 


690 


1,040 


1,870 


90 


103 


207 


374 


648 


978 


1,760 


100 


98 


196 


353 


612 


924 


1,660 


125 


87 


173 


313 


542 


819 


1,470 


150 


78 


157 


284 


491 


742 


1,330 


1.75 


72 


145 


261 


452 


683 


1,230 


200 


67 


135 


243 


420 


635 


1,140 


250 


60 


119 


215 


373 


563 


1,010 


300 


54 


108 


195 


338 


510 


916 


350 


50 


99 


179 


311 


469 


843 


400 


46 


92 


167 


289 


436 


784 


450 


43 


87 


157 


271 


409 


736 


500 


41 


82 


148 


256 


387 


695 



Note: All table entries are rounded to 3 significant digits. 



214 



FUEL PIPING 



Table 12-40 



Table 12-40 

Polyethylene Plastic Pipe [NFPA 54-09: Table 6.3(1)] 





Gas: 


Undiluted Propane 


Inlet Pressure: 


2.0 psi 


Pressure Drop: 


1.0 psi 


Specific Gravity: 


1.50 


INTENDED USE: PE Pipe Sizing Between 2 psi Service and Line Pressure Regulator 




Pipe Size (in.) 


Nominal OD: 


1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


Designation: 


SDR 9.33 


SDR 11.0 


SDR 11.00 


SDR 10.00 


SDR 11.00 


SDR 11.00 


Actual ID: 


0.660 


0.860 


1.077 


1.328 


1.554 


1.943 


Length (ft) 


Capacity in Thousands of Btu per Hour 


10 


3,130 


6,260 


11,300 


19,600 


29,500 


53,100 


20 


2,150 


4,300 


7,760 


13,400 


20,300 


36,500 


30 


1,730 


3,450 


6,230 


10,800 


16,300 


29,300 


40 


1,480 


2,960 


5,330 


9,240 


14,000 


25,100 


50 


1,310 


2,620 


4,730 


8,190 


12,400 


22,200 


60 


1,190 


2,370 


4,280 


7,420 


11,200 


20,100 


70 


1,090 


2,180 


3,940 


6,830 


10,300 


18,500 


80 


1,010 


2,030 


3,670 


6,350 


9,590 


17,200 


90 


952 


1,910 


3,440 


5,960 


9,000 


16,200 


100 


899 


1,800 


3,250 


5,630 


8,500 


15,300 


125 


797 


1,600 


2,880 


4,990 


7,530 


13,500 


150 


722 


1,450 


2,610 


4,520 


6,830 


12,300 


175 


664 


1,330 


2,400 


4,160 


6,280 


11,300 


200 


618 


1,240 


2,230 


3,870 


5,840 


10,500 


250 


548 


1,100 


1,980 


3,430 


5,180 


9,300 


300 


496 


994 


1,790 


3,110 


4,690 


8,430 


350 


457 


914 


1,650 


2,860 


4,320 


7,760 


400 


425 


851 


1,530 


2,660 


4,020 


7,220 


450 


399 


798 


1,440 


2,500 


3,770 


6,770 


500 


377 


754 


1,360 


2,360 


3,560 


6,390 


550 


358 


716 


1,290 


2,240 ■ 


3,380 


6,070 


600 


341 


683 


1,230 


2,140 


3,220 


5,790 


650 


327 


654 


1,180 


2,040 


3,090 


5,550 


700 


314 


628 


1,130 


1,960 


2,970 


5,330 


750 


302 


605 


1,090 


1,890 


2,860 


5,140 


800 


292 


585 


1,050 


1,830 


2,760 


4,960 


850 


283 


566 


1,020 


1,770 


2,670 


4,800 


900 


274 


549 


990 


1,710 


2,590 


4,650 


950 


266 


533 


961 


1,670 


2,520 


4,520 


1,000 


259 


518 


935 


1,620 


2,450 


4,400 


1,100 


246 


492 


888 


1,540 


. 2,320 


4,170 


1,200 


234 


470 


847 


1,470 


2,220 


3,980 


1,300 


225 


450 


811 


1,410 


2,120 


3,810 


1,400 


216 


432 


779 


1,350 


2,040 


3,660 


1,500 


208 


416 


751 


1,300 


1,960 


3,530 


1,600 


201 


402 


725 


1,260 


1,900 


3,410 


1,700 


194 


389 


702 


1,220 


1,840 


3,300 


1,800 


188 


377 


680 


1,180 


1,780 


3,200 


1,900 


183 


366 


661 


1,140 


1,730 


3,110 


2,000 


178 


356 


643 


1,110 


1,680 


3,020 



Note: All table entries are rounded to 3 significant digits. 



215 



Table 12-41 



UNIFORM PLUMBING CODE 



Table 12-41 

Polyethylene Plastic Tubing [NFPA 54-09: Table 6.3(m)] 





Gas: 


Undiluted Propane 


Inlet Pressure: 


11.0 in. w.c. 


Pressure Drop: 


0.5 in. w.c. 


Specific Gravity: 


1.50 


INTENDED USE: PE Tube Sizing Between Integral 

2-Stage Regulator at Tank or Second Stage {Low Pressure 

Regulator) and Building. 




Plastic Tubing Size (CTS) (in.) 


Nominal OD: 


1/2 


3/4 


Designation: 


SDR 7.00 


SDR 11.00 


Actual ID: 


0.445 


0.927 


Length (ft) 


Capacity in Thousands of Btu per Hour 


10 
20 
30 
40 
50 


121 

83 
67 
57 
51 


828 
569 
457 . 
391 

347 


60 

70 

80 

90 

100 


46 
42 
39 

37 
35 


314 

289 
269 

252 
238 


125 
150 

175 
200 


31 

28 
26 
24 


211 
191 
176 
164 


225 
250 
275 
300 


22 
21 
20 
19 


154 
145 
138 
132 


350 
400 
450 
500 


18 
16 
15 
15 


121 
113 

106 
100 



Note: All table entries are rounded to 3 significant digits. 



216 



CHAPTER 13 

HEALTH CARE FACILITIES AND MEDICAL GAS AND VACUUM SYSTEMS 



Part I - Special Requirements for 
Health Care Facilities. 

1301.0 Application. 

1301.1 Construction and equipment requirements 
shall be applied only to new construction and new 
equipment, except as modified in individual chap- 
ters. Only the altered, renovated, or modernized 
portion of an existing system or individual compo- 
nent shall be required to meet the installation and 
equipment requirements stated in this standard. If 
the alteration, renovation, or modernization 
adversely impacts existing performance requirements 
of a system or component, additional upgrading 
shall be required. [NFPA 99:1.3.2] 

1301.2 This chapter applies to the special fixtures 
and systems in health care facilities and to the special 
plumbing requirements for such facilities. Other 
plumbing in such facilities shall comply with other 
applicable sections of this code. 

1301.3 This chapter shall not apply to breathing air 
replenishment (BAR) systems. 

1302.0 Medical Gas and Vacuum Piping Systems 
- Installation Requirements. 

The installation of medical gas and vacuum piping 
systems shall be in accordance with the requirements 
of this chapter and /or the appropriate standards 
adopted by the Authority Having Jurisdiction. For 
additional standards, see Table 14-1. 

1302.1 The installation of individual components 
shall be made in accordance with the instructions of 
the manufacturer. Such instructions shall include 
directions and information deemed by the manufac- 
turer to be adequate for attaining proper operation, 
testing, and maintenance of the medical gas and 
vacuum systems. Copies of the manufacturer's 
instructions shall be left with the system owner. 
[NFPA 99:5.1.10.10.9.1 - 5.1.10.10.9.3] 

1302.2 The installation of medical gas and vacuum 
systems shall be made by qualified, competent tech- 
nicians who are experienced in making such installa- 
tions. Installers of medical gas and vacuum systems 
shall meet the requirements of ASSE Standard 6010, 
Professional Qualification Standard for Medical Gas and 
Vacuum System Installers. [NFPA 99:5.1.10.10.11.1 - 
5.1.10.10.11.2] 

1302.3 Brazing shall be performed by individuals 
who are qualified under the provisions of Section 
1311.6. [NFPA 99:5.1.10.10.11.3] 



1302.4 Prior to any installation work, the installer of 
medical gas and vacuum piping shall provide and 
maintain documentation on the job site for the quali- 
fication of brazing procedures and individual 
brazers that are required under Section 1311.6. 
[NFPA 99:5.1.10.10.11.4] 

1303.0 Protrusions from Walls. 

1303.1 Drinking fountain control valves shall be 
flush-mounted or fully recessed when installed in 
corridors or other areas where patients are trans- 
ported on a gurney, bed, or wheelchair. 

1303.2 Piping exposed in corridors and other areas 
where subject to physical damage from the move- 
ment of carts, stretchers, portable equipment, or vehi- 
cles shall be protected. [NFPA 99:5.1.10.10.2.1] 

1304.0 Psychiatric Patient Rooms. 

Piping and drain traps in psychiatric patient rooms 
shall be concealed. Fixtures and fittings shall be 
resistant to vandalism. 

1305.0 Locations for Ice Storage. 

Ice makers or ice storage containers shall be located 
in nursing stations or similarly supervised areas to 
minimize potential contamination. 

1306.0 Sterilizers. 

1306.1 General. The requirements of this section 
apply to sterilizers and bedpan steamers. Such 
equipment shall be installed in accordance with this 
code and the manufacturer's installation instructions. 

1306.2 Indirect Waste Connections. Waste 
drainage from sterilizers and bedpan steamers shall 
be connected to the sanitary drainage system through 
an airgap in accordance with this chapter and Chapter 
8. The size of indirect waste piping shall be not less 
than the size of the drain connection on the fixture. 
Each such indirect waste pipe shall not exceed fifteen 
(15) feet (4,572 mm) in length and shall be separately 
piped to a receptor. Such receptors shall be located in 
the same room as the equipment served. Except for 
bedpan steamers, such indirect waste pipes shall not 
require traps. A trap having a seal of not less than 
three (3) inches (76 mm) shall be provided in the indi- 
rect waste pipe for a bedpan steamer. 



217 



1307.0-1310.5 



UNIFORM PLUMBING CODE 



1307.0 Vapor Vents and Stacks for Sterilizers. 

1307.1 General. When a sterilizer has provision for 
a vapor vent and such a vent is required by the 
manufacturer, the vent shall be extended to the 
outdoors above the roof. Sterilizer vapor vents shall 
be installed in accordance with the manufacturer's 
instructions and shall not be connected to any 
drainage system vent. 

1308.0 Aspirators. 

1308.1 (See Section 603.4.9, Water Inlets to Water 
Supplied Aspirators.) Provisions for aspirators or 
other water-supplied suction devices shall be 
installed only with the specific approval of the 
Authority Having Jurisdiction. Where aspirators are 
used for removing body fluids, they shall include a 
collection container to collect liquids and solid parti- 
cles. Aspirators shall indirectly discharge to the sani- 
tary drainage system through an airgap in accor- 
dance with Chapter 8. The potable water supply to 
an aspirator shall be protected by a vacuum breaker 
or equivalent backflow protection device in accor- 
dance with Section 603.0. 

Part II - Medical Gas and Vacuum Systems. 

1309.0 Application. 

1309.1 The provisions herein shall apply to the 
installation, testing, and verification of medical gas 
and vacuum piping in hospitals, clinics, and other 
health care facilities. 

1309.2 The purpose of this chapter is to provide 
requirements for the installation, testing, and verifi- 
cation of medical gas and medical vacuum systems, 
from the central supply system to the station outlets 
or inlets. 

1309.3 Wherever the terms medical gas or vacuum 
occur, the provisions shall apply to piped systems 
for oxygen, nitrous oxide, medical air, carbon 
dioxide, helium, medical-surgical vacuum, waste 
anesthetic gas disposal, and mixtures thereof. Wher- 
ever the name of a specific gas or vacuum service 
occurs, the provision shall apply only to that gas. 
[NFPA 99:5.1.1.2] 

1309.4 This chapter does not apply to portable 
compressed gas systems. 

1309.5 This chapter does not apply to: 

(A) Cylinder and container management, storage, 
and reserve requirements. 

(B) Gas central supply and bulk supply systems, 
except as addressed in this chapter. 



(C) Electrical connections and requirements. 

(D) Motor requirements and controls. 

(E) Systems having nonstandard operating pres™ 
sures, except as addressed in this chapter. 

(F) Waste anesthetic gas disposal (WAGD) systems. 

(G) Surface-mounted medical gas rail systems 

1309.6 The requirements of this chapter shall not be 
interpreted to conflict with the requirements of 
NFPA 99, Standard for Health Care Facilities. For 
requirements of portions of medical gas and medical 
vacuum systems not addressed in this chapter or 
medical gas and medical vacuum systems beyond 
the scope of this chapter refer to NFPA 99, Standard 
for Health Care Facilities. 

1309.7 An existing system that is not in strict 
compliance with the provisions of the standard 
(Code) shall be permitted to be continued in use as 
long as the Authority Having Jurisdiction has deter- 
mined that such use does not constitute a distinct 
hazard to life. [NFPA 99:5.1.1.4] 

1310.0 Definitions. 

1310.1 Building Supply - The pipe from the source 
of supply to a building or structure. 

1310.2 Critical Care Area - Those special care 
units, intensive care units, coronary care units, 
angiography laboratories, cardiac catheterization 
laboratories, delivery rooms, operating rooms, post 
anesthesia recovery rooms, emergency departments, 
and similar areas in which patients are intended to 
be subjected to invasive procedures and connected 
to line-operated, patient-care-related electrical appli- 
ances. [NFPA 99:3.3.138.1] 

1310.3 General Care Areas - General care areas are 
patient bedrooms, examining rooms, treatment 
rooms, clinics, and similar areas in which it is 
intended that the patient will come in contact with 
ordinary appliances such as a nurses-call system, 
electric beds, examining lamps, telephones, and 
entertainment devices. [NFPA 99:3.3.138.2] 

1310.4 Manifold - A device for connecting outlets of 
one (1) or more gas cylinders to the central piping 
system for that specific gas. [NFPA 99:3.3.103] 

1310.5 Medical Air - For purposes of this standard, 
medical air is air supplied from cylinders, bulk 
containers, medical air compressors, or has been 
reconstituted from oxygen USP and oil-free, dry 
nitrogen NF. Medical air shall be required to have 
the following characteristics [NFPA 99:3.3.106]: 

(1) Be supplied from cylinders, bulk containers, 
medical air compressor sources, or be reconsti- 
tuted from oxygen USP and oil-free dry nitrogen 

NF. 



218 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

(2) Meet the requirements of medical air USP. 

(3) Have no detectable liquid hydrocarbons. 

(4) Have less than twenty-five (25) ppm gaseous 
hydrocarbons. 

(5) Have equal to or less than five (5) mg/m 3 of 
permanent particulates sized one (1) micron or 
larger in the air at normal atmospheric pressure. 
[NFPA 99:5.1 .3.5.1(1X5)] 

1310.6 Medical Gas - Gas used in a medical 
facility, including oxygen, nitrous oxide, carbon 
dioxide, helium, medical air, and mixtures of these 
gases. Standards of purity apply. 

1310.7 Medical Gas System - Complete system 
consisting of a central supply system (manifold, 
bulk, or compressors), including control equipment 
and piping extending to station outlets at the points 
where medical gases are required. 

1310.8 Medical Vacuum System - See 1310.19, 
Vacuum System - Level 1. 

1310.9 Nitrogen, NF (Oil-Free, Dry) (Nitrogen for 
Brazing and Testing) - Nitrogen complying, at a 
minimum, with oil-free, dry nitrogen NF. [NFPA 
99:3.3.120.1] 

1310.10 Patient Care Area - Any portion of a health 
care facility wherein patients are intended to be 
examined or treated. [NFPA 99:3.3.138] 

1310.11 Purge, Flow - The removal of oxygen from 
a system by oil-free dry nitrogen during brazing. 

1310.12 Purge, System - The removal of nitrogen 
from a system with the medical gas required for that 
system. 

1310.13 SCFM - Standard cubic feet per minute. 
[NFPA 99:3.3.163] 

1310.14 Special Hazard Area - An area such as a 
kitchen or electrical switch-gear room. 

1310.15 Station Inlet - An inlet point in a medical- 
surgical piped vacuum distribution system at which 
the user makes connections and disconnections. 
[NFPA 99:3.3.171] 

1310.16 Station Outlet - An inlet point in a piped 
medical /surgical vacuum distribution system at 
which the user makes connections and disconnec- 
tions. [NFPA 99:3.3.172] 

1310.17 Use Point - A room or area of a room 
where medical gases are dispensed to a single 
patient for medical purposes. A use point is 
permitted to be comprised of a number of station 
outlets of different gases. [NFPA 99:3.3.180] 

1310.18 User Outlet - See Station Outlet. 

1310.19 Vacuum System - Level 1 - A system 
consisting of central vacuum-producing equipment 
with pressure and operating controls, shutoff valves, 



1310.5-1311.1 

alarm warning systems, gauges, and a network of 
piping extending to and terminating with suitable 
station inlets at locations where patient suction could 
be required. [NFPA 99:3.3.91] 

1310.20 Valve, Isolation - A valve that isolates one 
(1) piece of equipment from another. 

1310.21 Valve, Riser - A valve at the base of a 
vertical riser that isolates that riser. 

1310.22 Valve, Service - A valve serving horizontal 
piping extending from a riser to a station outlet or 
inlet. 

1310.23 Valve, Source - A single valve at the 
source that controls a number of units that make up 
the source. 

1310.24 Valve, Zone - A valve that controls the gas 
or vacuum to a particular area. 

1310.25 Waste Anesthetic Gas Disposal - The 

process of capturing and carrying away gases vented 
from the patient breathing circuit during the normal 
operation of gas anesthesia or analgesia equipment. 
[NFPA 99:3.3.184] 

1311.0 General Requirements. 

1311.1 Oxygen Compatibility. Tubes, valves, 
fittings, station outlets, and other piping components 
in medical gas systems shall have been cleaned for 
oxygen service by the manufacturer prior to installa- 
tion in accordance with CGA 4.1, Cleaning Equipment 
for Oxygen Service, except that fittings shall be 
permitted to be cleaned by a supplier or agency 
other than the manufacturer. [NFPA 99:5.1.10.1.1] 

1311.1.1 Components include but are not 
limited to containers, valves, valve seats, lubri- 
cants, fittings, gaskets, and interconnecting 
equipment including hose. Easily ignitable mate- 
rials should be avoided. 

Compatibility involves both combustibility 
and ease of ignition. Materials that burn in air 
will burn violently in pure oxygen at normal 
pressure and explosively in pressurized oxygen. 
Also, many materials that do not burn in air will 
do so in pure oxygen, particularly under pres- 
sure. Metals for containers and piping have to be 
carefully selected, depending on service condi- 
tions. The various steels are acceptable for many 
applications, but some service conditions can 
call for other materials (usually copper or its 
alloys) because of their greater resistance to igni- 
tion and lower rate of combustion. Similarly, 
materials that can be ignited in air have lower 
ignition energies in oxygen. Many such mate- 
rials can be ignited by friction at a valve seat, 
stem packing or by adiabatic compression 



219 



1311.1 -1312.1 



UNIFORM PLUMBING CODE 



produced when oxygen at high pressure is 
rapidly introduced into a system initially at low 
pressure. 

1311.1.2 Materials used in centra) supply 
systems shall meet the following requirement 
[NFPA 99:5.1.3.4.4]: 

In those portions of systems intended to 
handle oxygen or nitrous oxide at gauge pres- 
sures of less than three-hundred (300) psi (2,070 
kPa), materia] construction shall be compatible 
with oxygen under the temperatures and pres- 
sures to which the components can be exposed 
in the containment and use of oxygen, nitrous 
oxide, mixtures of these gases, or mixtures 
containing more than 23.5 percent oxygen. 
[NFPA 99:5.1.3.4.4(1), (2)] 

1311.2 Certification of medical gas and medical 
vacuum systems shall conform to the requirements 
of Section 1328.0 of this code, the Authority Having 
Jurisdiction, and NFPA 99, Standard for Health Care 
Facilities, Section 5.1.12. 

1311.3 Prior to any installation work, the installer of 
medical gas and vacuum piping shall provide and 
maintain documentation on the job site for the quali- 
fication of brazing procedures and individual 
brazers that are required under Section 1311.6. 
[NFPA 99:5.1.10.10.11.4] 

1311.3.1 Each length of tube shall be delivered 
plugged or capped by the manufacturer and 
kept sealed until prepared for installation. 
Fittings, valves, and other components shall be 
delivered sealed, labeled, and kept sealed until 
prepared for installation. [NFPA 99:5.1.10.1.2 
and 5.1.10.1.3] 

1311.4 Medical gas and medical vacuum systems 
shall be supplied from a source consisting of not less 
than two (2) units - primary and secondary, e.g., a 
manifold consisting of two (2) cylinder banks with 
not less than two (2) cylinders in each bank, not less 
than two (2) air compressors, or not less than two (2) 
vacuum pumps. However, two (2) supply pipelines 
are not required. 

1 31 1 .5 Health Care Organization personnel shall be 
permitted to install piping systems if the require- 
ments of this chapter are met during installation. 
[NFPA 99:5.1.10.10.11.5] 

1 31 1 .6 Brazing procedures and brazer performance 
for the installation of medical gas and vacuum 
piping shall be qualified in accordance with either 
Section IX, Welding and Brazing Qualifications, of 

the ASME Boiler and Pressure Vessel Code, ox AWS 
B2.2, Standard for Brazing Procedure and Performance 
Qualifications, both as modified below. [NFPA 
99:5.1.10.10.12.1] 



1311.6.1 Brazers shall be qualified by visual 
examination of the test coupon followed by 
sectioning. [NFPA 99:5.1.10.10.12.2] 

1311.6.2 The Brazing Procedure Specification 
(BPS) shall address cleaning, joint clearance, 
overlap, internal purge gas purge gas flow rate, 
and filler metal. [NFPA 99:5.1.10.10.12.3] 

1311.6.3 The brazing procedure specification 
and the record of brazer performance qualifica- 
tion shall document filler metal used, cleaning, 
joint clearance, overlap, internal purge gas, and 
flow rate during brazing of coupon, and the 
absence of internal oxidation in the completed 
coupon. [NFPA 99:5.1.10.10.12.4] 

1311 .6.4 Brazing procedures qualified by a tech- 
nically competent group or agency shall be 
permitted under the following conditions: 

(1 ) The brazing procedure specification and the 
procedure qualification record meets the 
requirements of this standard. 

(2) The employer obtains a copy of both the 
brazing procedure specification and the 
supporting qualification records from the 
group or agency and signs and dates these 
records, thereby accepting responsibility for 
the qualifications that were performed by 
the group or agency. 

(3) The employer qualifies not less than one (1) 
brazer following each brazing procedure 
specification used. [NFPA 99:5.1.10.10.12.5] 

1311.6.5 An employer shall be permitted to 
accept brazer qualification records of a previous 
employer under the following conditions: 

(1) The brazer has been qualified following the 
same or an equivalent procedure that the 
new employer uses. 

(2) The new employer obtains a copy of the 
record of brazer performance qualification 
tests from the previous employer and signs 
and dates these records, thereby accepting 
responsibility for the qualifications performed 
by the previous employer. [NFPA 
99:5.1.10.10.12.6] 

1311.6.6 Performance qualifications of brazers 
shall remain in effect indefinitely unless the 
brazer does not braze with the qualified proce- 
dure for a period exceeding six (6) months, or 
there is a specific reason to question the ability 
of the brazer. [NFPA 99:5.1.10.10.12.7] 

1312.0 Plan Review. 

1312.1 Before any medical gas or medical vacuum 
system is installed or altered in any hospital, 



220 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

medical facility, or clinic, duplicate plans and speci- 
fications shall be filed with the Authority Having 
Jurisdiction. Approval of the plans shall be obtained 
prior to issuance of any permit by the Authority 
Having Jurisdiction. 

1312.2 Plans and specifications shall show the 
following, in detail: 

1312.2.1 Plot plan of the site, drawn to scale, 
indicating the location of existing or new 
cylinder storage areas, property lines, drive- 
ways, and existing or proposed buildings. 

1312.2.2 Piping layout of the proposed piping 
system or alteration, including alarms, valves, 
origin of gases, and user outlets /inlets. The 
demand and loading of any piping, existing or 
future, shall also be indicated. 

1312.2.3 Complete specification of materials. 

1312.3 Plans and specifications submitted to the 
Authority Having Jurisdiction shall clearly indicate 
the nature and extent of the work proposed and shall 
show in detail that such work will conform to the 
provisions of this code. 

1312.4 A record of as-built plans and valve identifi- 
cation records shall remain on the site at all times. 

1313.0 System Performance. 

1313.1 Required Operating Pressures. Medical gas 
and medical vacuum systems shall be capable of deliv- 
ering service in the pressure ranges listed in Table 13-1. 

1313.2 Minimum Flow Rates. Medical gas and 
medical vacuum systems shall be capable of 
supplying the flow rates listed in Table 13-2. 

1313.3 Minimum Station Outlets/Inlets. Station 
outlets and inlets for medical gas and medical vacuum 
systems shall be provided as listed in Table 13-3. 

1314.0 Required Pipe Sizing. 

1314.1 Where the maximum demand for each 
medical gas or vacuum system and the maximum 
length of piping between the source equipment and 
the most distant station outlet /inlet do not exceed the 
values in Table 13-6, the size of pipe of each section of 
the system shall be determined using Tables 13-4 and 
13-6. The size for systems beyond the range of Table 
13-6 shall be determined by using the methods set 
forth in Section 1314.3 of this chapter. 

1314.2 To determine the size of each section of pipe 
in any system within the range of Table 13-6, 
proceed as follows: 

1314.2.1 Measure the length of the pipe from 
the source equipment location to the most 
remote station inlet /outlet on the system. " 



1312.1 -1316.0 

1314.2.2 In Table 13-6, select the column 
showing that distance, or the next longer 
distance if the table does not give the exact 
length. 

1314.2.3 Starting at the most remote outlet /inlet, 
find in the vertical column just selected the 
medical gas or vacuum demand for that inlet/ 
outlet. If the exact figure of demand is not shown, 
choose the next larger figure below in the column. 

1314.2.4 Opposite this demand figure, in the 
first column at the left in Table 13-6, will be 
found the correct size of pipe. 

1314.2.5 Using this same vertical column, 
proceed in a similar manner for each section of 
pipe serving this inlet /outlet. For each section of 
pipe, determine the total gas or vacuum demand 
supplied by the section, using Table 13-4. 

1314.2.6 Size each section of branch piping not 
previously sized by measuring the distance from 
the source equipment location to the most 
remote inlet /outlet in that branch, and follow 
the procedures of Sections 1314.2.2 through 
1314.2.5. 

Note: Size branch piping in the order of the distance 
from the source location, beginning with the most 
distant outlet not previously sized. 

1314.3 For conditions other than those covered by 
Section 1314.1 of this section, such as longer runs of 
greater gas or vacuum demands, the size of each gas 
or vacuum piping system shall be determined by 
standard engineering methods acceptable to the 
Authority Having Jurisdiction, and each system shall 
be so designed that the total pressure drop or gain 
between the source equipment and any inlet /outlet 
shall not exceed the allowable pressures shown in 
Table 13-1. 

1315.0 Workmanship. 

1315.1 Design, construction, and workmanship shall 
be in conformity with accepted engineering practices 
and shall meet the requirements of this code. 

1315.2 Cracks, holes, or other imperfections in mate- 
rials shall not be concealed by welding, brazing, or 
soldering, or by using paint, wax, tar, other leak- 
sealing or repair agents. 

1315.3 Burred ends of all tubing shall be deburred 
using a deburring tool to the full bore of the tube, 
and all chips shall be removed. 

1316.0 Materials. 

The provisions of this section apply to the field- 
installed piping for the distribution of medical piped 
gases. 



221 



1316.1 -1316.6 



UNIFORM PLUMBING CODE 



1316.1 Tubes, valves, fittings, station outlets, and 
other piping components in medical gas systems 
shall have been cleaned for oxygen service by the 
manufacturer prior to installation in accordance 
with CGA 4.1, Cleaning Equipment for Oxygen Service, 
except that fittings shall be permitted to be cleaned 
by a supplier or agency other than the manufac- 
turer. [NFPA 99:5.1.10.1.1] 

1316.2 Each length of tube shall be delivered 
plugged or capped by the manufacturer and kept 
sealed until prepared for installation. Fittings, 
valves, and other components shall be delivered 
sealed, labeled, and kept sealed until prepared for 
installation. [NFPA 99:5.1.10.1.2, 5.1.10.1.3] 

1316.3 Tubes shall be hard-drawn seamless copper 
ASTM B 819 medical gas tube, Type L, except that 
where operating pressures are exceeding a gauge 
pressure of one-hundred and eighty-five (185) psi 
(1,275 kPa), Type K shall be used for sizes exceeding 
DN80 (NPS 3) (34/8 in. O.D.). 

ASTM B 819 medical gas tube shall be identified 
by the manufacturer's markings "OXY," "MED," 
TT OXY/MED, M "OXY/ACR," or "ACR/MED" in blue 
(Type L) or green (Type K). [NFPA 99:5.1.10.1.4, 
5.1.10.1.5] 

Piping for vacuum systems shall be constructed 
of any of the following: 

(1) Hard-drawn seamless copper tube: 

(a) ASTM B 88, Standard Specification for Seamless 
Copper Water Tube, (Types K, L, M). 

(b) ASTM B 280, Standard Specification for Seam- 
less Copper Tubing for Air Conditioning and 
Refrigeration Field Service (copper ACR tube). 

(c) ASTM B 819, Standard Specification for Seamless 
Copper Tube for Medical Gas Systems, copper 
medical gas tubing (Type K or L). 

(2) Stainless steel tube. [NFPA 99:5.1.10.2.1]: 

Piping systems shall be designed and sized to 
deliver the required flow rates at the utilization pres- 
sures. 

Mains and branches in medical gas-piping 
systems shall be not less than DN15 (NPS 1/2) (5/8 
in. O.D.) size. 

Mains and branches in medical-surgical vacuum 
systems shall be not less than DN20 (NPS 3/4) (7/8 
in. O.D.) size. 

Drops to individual station outlets and inlets 
shall be not less than DN15 (NPS 1/2) (5/8 in. O.D.) 
size. 

Runouts to alarm panels and connecting tubing 
for gauges and alarm devices shall be permitted to 
be DN8 (NPS 1/4) (3/8 in. O.D.) size. [NFPA 
99:5.1.10.10.1.1-5.1.10.10.1.5] 



1316.4 Turns, offsets, and other changes in direction 
in welded or brazed medical gas and vacuum piping 
shall be made with wrought-copper capillary fittings 
complying with ASME B16.22, Wrought Copper and 
Copper Alloy Solder-Joint Pressure Fittings, or brazed 
fittings complying with ASME B16.50, Wrought 
Copper and Copper Alloy Braze-Joint Pressure Fittings. 
[NFPA 99:5.1.10.3.1] 

1316.4.1 Cast-copper alloy fittings shall not be 
permitted. [NFPA 99:5.1.10.3.2] 

1316.4.2 Branch connections in vacuum piping 
systems shall be permitted to be made using 
mechanically formed, drilled, and extruded tee- 
branch connections that are formed in accordance 
with the tool manufacturer's instructions and 
brazed. [NFPA 99:5.1.10.3.3] 

1316.5 The following special fittings shall be 
permitted to be used in lieu of brazed joints: 

(1) Memory-metal couplings having temperature 
and pressure ratings joints not less than that of a 
brazed joint. 

(2) Listed or approved metallic gas tube fittings 
that, when made up, provide a permanent joint 
having the mechanical, thermal, and sealing 
integrity of a brazed joint. 

(3) Dielectric fittings, where required by the manu- 
facturer of special medical equipment to electri- 
cally isolate the equipment from the piping 
distribution system. 

(4) Axially swaged, elastic strain preload fittings 
providing metal to metal seal having pressure and 
temperature ratings not less than that of a 
brazed joint and, when complete, are permanent 
and nonseparable. [NFPA 99:5.1.10.7] 

1316.6 The following joints shall be prohibited 
throughout medical gas and vacuum distribution 
pipeline systems: 

(1) Flared and compression-type connections, 
including connections to station outlets and 
inlets, alarm devices, and other components. 

(2) Other straight-threaded connections, including 
unions. 

(3) The use of pipe-crimping tools to permanently 
stop the flow. [NFPA 99:5.1.10.8] 

131 6.6.1 Threaded joints in medical gas and 
vacuum distribution piping shall meet the 
following requirements: 

(1) Be limited to connections to pressure/ 
vacuum indicators, alarm devices, and 
source equipment. 

(2) Be tapered pipe threads complying with 
ASME Bl.20.1, Pipe Threads General Purpose, 
Inc. 



222 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

(3) Be made up with polytetrafluoroethylene (such 
as Teflon'™) tape or other thread sealant 
recommended for oxygen service, with the 
sealant applied to the male threads only. 
[NFPA 99:5.1.10.4] 

1316.7 New or replacement shutoff valves shall be 
as follows: 

(1) Quarter turn, full ported ball type. 

(2) Brass or bronze construction. 

(3) Have extensions for brazing. 

(4) Have a handle indicating open or closed. 

(5) Consist of three pieces permitting in-line service- 
ability. [NFPA 99:5.1.4.3] 

1316.8 Soldered joints in copper Level 3 vacuum and 
Level 3 gas-powered systems piping shall be made 
in accordance with ASTM B 828, Making Capillary 
Joints by Soldering of Copper and Copper Alloy Tube and 
Fittings, using a lead-free solder filler metal 
containing not more than 0.2 percent lead by 
volume. [NFPA 99:5.3.10.5] 

1317.0 Cleaning for Medical Gas Piping Systems. 

1317.1 The interior surfaces of tube ends, fittings, 
and other components that were cleaned for oxygen 
service by the manufacturer, but become contami- 
nated prior to being installed, shall be permitted to 
be recleaned on-site by the installer by thoroughly 
scrubbing the interior surfaces with a clean, hot 
water-alkaline solution, such as sodium carbonate or 
trisodium phosphate one (1) pound to three (3) 
gallons (450 g to 11 L) of potable water and thor- 
oughly rinsing them with clean, hot potable water. 
Other aqueous cleaning solutions shall be permitted 
to be used for on-site recleaning permitted above, 
provided that they are as recommended in CGA 
Pamphlet G-4.1, Cleaning Equipment for Oxygen 
Service, and are listed in CGA Pamphlet 02-DIR, 
Directory of Cleaning Agents for Oxygen Service. [NFPA 
99:5.1.10.5.3.10 and 5.1.10.5.3.11] 

1317.2 Material that has become contaminated inter- 
nally and is not clean for oxygen service shall not be 
installed. [NFPA 99:5.1.10.5.3.12] 

1318.0 Installation of Piping. 

1318.1 Piping shall be protected against freezing, 
corrosion, and physical damage. [NFPA 
99:5.1.10.10.2] 

Piping exposed in corridors and other areas 
where subject to physical damage from the move- 
ment of carts, stretchers, portable equipment, or 
vehicles shall be protected. [NFPA 99:5.1.10.10.2.1] 



1316.6-1318.4 

Piping underground within buildings or 
embedded in concrete floors or walls shall be 
installed in a continuous conduit. [NFPA 
99:5.1.10.10.2.2] 

1318.2 Piping risers shall be permitted to be 
installed in pipe shafts if protected from physical 
damage, effects of excessive heat, corrosion, or 
contact with oil. 

Piping shall not be installed in kitchens, elevator 
shafts, elevator machine rooms, areas with open 
flames, electrical service equipment exceeding 600 
volts, and areas prohibited under NFPA 70, National 
Electrical Code, except for the following locations: 

(1) Room locations for medical air compressor 
supply systems and medical-surgical 
vacuum pump supply systems. 

(2) Room locations for secondary distribution 
circuit panels and breakers having a 
maximum voltage rating of 600 volts. 

Medical gas piping shall be permitted to be 
installed in the same service trench or tunnel with 
fuel gas lines, fuel oil lines, electrical lines, steam 
lines, and similar utilities provided that the space is 
ventilated (naturally or mechanically) and the 
ambient temperature around the medical gas piping 
shall not exceed 130°F (54°C ). 

Medical gas piping shall not be located where 
subject to contact with oil, including a possible 
flooding area in the case of a major oil leak. [NFPA 
99:5.1.10.10.3] 

1318.3 Buried piping outside of buildings shall be 
installed below the local level of frost penetration. 
[NFPA 99:5.1.10.10.5.1] 

1318.4 The installation procedure for underground 
piping shall protect the piping from physical damage 
while being backfilled. [NFPA 99:5.1.10.10.5.2] 

If underground piping is protected by a conduit, 
cover, or other enclosure, the following requirements 
shall be met [NFPA 99:5.1.10.10.5.3]: 

(1) Access shall be provided at the joints for visual 
inspection and leak testing. 

(2) The conduit, cover, or enclosure shall be self- 
draining and not retain groundwater in 
prolonged contact with the pipe. 

Buried piping that will be subject to surface 
loads shall be buried at a depth that will protect the 
piping and its enclosure from excessive stresses. 
[NFPA 99:5.1.10.10.5.4] 

The minimum backfilled cover above the top of 
the pipe or its enclosure for buried piping outside of 
buildings shall be thirty-six (36) inches (900 mm), 
except that the minimum cover shall be permitted to 



223 



1318.4-1319.1 



UNIFORM PLUMBING CODE 



be reduced to eighteen (18) inches (450 mm) where 
physical damage is otherwise prevented. [NFPA 
99:5.1.10.10.5.5] 

Trenches shall be excavated so that the pipe enclo- 
sure has firm, substantially continuous bearing on the 
bottom of the trench. [NFPA 99:5.1.10.10.5.6] 

Backfill shall be clean and compacted so as to 
protect and uniformly support the pipe enclosure. 
[NFPA 99:5.1.10.10.5.7] 

A continuous tape or marker placed immediately 
above the enclosure shall clearly identify the pipeline 
by specific name. [NFPA 99:5.1.10.10.5.8] 

A continuous warning means shall also be 
provided above the pipeline at approximately one- 
half (1/2) the depth of bury. [NFPA 99:5.1.10.10.5.9] 

Where underground piping is installed through 
a wall sleeve, the ends of the sleeve shall be sealed to 
prevent the entrance of groundwater into the 
building. [NFPA 99:5.1.10.10.5.10]] 

1318.5 Hose and flexible connectors, both metallic 
and nonmetallic, shall be no longer than necessary 
and shall not penetrate or be concealed in walls, 
floors, ceilings, or partitions. Flexible connectors, 
metallic or nonmetallic, shall have a minimum burst 
pressure, with a gauge pressure of one-thousand 
(1,000) psi (6,895 kPa). [NFPA 99:5.1.10.10.7.1 - 
5.1,10.10.7.2] 

1318.6 Where a positive-pressure medical gas- 
piping distribution system, originally used or 
constructed for the use at one (1) pressure and for 
one (1) gas, is converted for operation at another 
pressure or for another gas, the provisions of Section 
1316.0 shall apply as if the system were new. [NFPA 
99:5.1.10.10.10.1] 

A vacuum system shall not be permitted to be 
converted for use as a gas system. [NFPA 
99:5.1.10.10.10.2] 

1318.7 Piping exposed in corridors and other areas 
where subject to physical damage from the move- 
ment of carts, stretchers, portable equipment, or vehi- 
cles shall be protected. [NFPA 99:5.1.10.10.2.1] 

1318.8 Piping shall be supported from the building 
structure in accordance with MSS Standard Practice 
SP-69, Piping Hangers and Supports - Selection and 
Application. [NFPA 99:5.1.10.10.4.1] 

Hangers and supports shall comply with MSS 
Standard Practice SP-58, Pipe Hangers and Supports - 
Materials, Design, and Manufacture. [NFPA 
99:5.1.10.10.4.2] 

Hangers for copper tube shall have a copper 
finish and be sized for copper tube. [NFPA 
99:5.1.10.10,4.3] 



In potentially damp locations, copper tube hangers 
or supports that are in contact with the tube shall be 
plastic-coated or otherwise be insulated from the tube. 
[NFPA 99:5.1.10.10.4.4] 

Maximum support spacing shall be in accor- 
dance with Table 13-7. [NFPA 99: Table 5.1.10.4.5] 

1318.9 Where required, medical gas and vacuum 
piping shall be seismically restrained against earth- 
quakes in accordance with the applicable building 
code. [NFPA 99:5.1.10.10.4.6] Seismic considerations 
shall conform to the requirements of this code and 
the Authority Having Jurisdiction. 

1318.10 Two (2) or more medical gas-piping systems 
shall not be interconnected for testing or any other 
reason. Leak testing shall be accomplished by sepa- 
rately charging and testing the individual piping 
system. [NFPA 99:5.1.10.10.8.1 - 5.1.10.10.8.2] 

1318.11 Piping shall be labeled by stenciling or 
adhesive markers that identify the patient medical 
gas, the support gas, or vacuum system, and include: 

(1) The name of the gas /vacuum system or the 
chemical symbol per NFPA 99: Table 5.1.11. 

(2) The gas or vacuum system color code per NFPA 
99: Table 5.1.11. 

(3) Where positive-pressure gas piping systems 
operate at pressures other than the standard 
gauge pressure in NFPA 99: Table 5.1.11, the 
pipe labeling shall include the operating pres- 
sure in addition to the name of the gas. [NFPA 
99:5.1.11.1.1] 

1319.0 Joints. 

This section sets forth the requirements for pipe joint 
installation for positive-pressure medical gas 
systems. 

1319.1 Brazed joints shall be made using a brazing 
alloy that exhibits a melting temperature in excess of 
1,000°F (538°C) to retain the integrity of the piping 
system in the event of fire exposure. [NFPA 
99:5.1.10.5.1.1] 

Brazed tube joints shall be the socket type. 
[NFPA 99:5.1.10.5.1.2] 

Filler metals shall bond with and be metallurgi- 
cally compatible with the base metals being joined. 
[NFPA 99:5.1.10.5.1.3] 

Filler metals shall comply with AWS A. 5. 8, Spec- 
ification for Filler Metals for Brazing and Braze Welding . 
[NFPA 99:5.1.10.5.1.4] 

Copper-to-copper joints shall be brazed using a 
copper-phosphorus or copper-phosphorus-silver 
brazing filler metal (BCuP series) without flux. 
[NFPA 99:5.1.10.5.1.5] 



224 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

Flux shall only be used when brazing dissimilar 
metals, such as copper and bronze or brass, using a 
silver (BAg series) brazing filler material. [NFPA 
99:5.1.10.5.4.1] 

Joints to be brazed in place shall be accessible for 
necessary preparation, assembly, heating, filler 
application, cooling, cleaning, and inspection. [NFPA 
99:5.1.10.5.1.7] 

1319.2 Tube ends shall be cut square using a sharp 
tubing cutter to avoid deforming the tube. [NFPA 
99:5.1.10.5.2.1] 

The cutting wheels on tubing cutters shall be 
free from grease, oil, or other lubricant not suitable 
for oxygen service. [NFPA 99:5.1.10.5.2.2] 

The cut ends of the tube shall be deburred with a 
sharp, clean deburring tool, taking care to prevent 
chips from entering the tube. [NFPA 99:5.1.10.5.2.3] 

1319.3 The interior surfaces of tubes, fittings, and 
other components that are cleaned for oxygen service 
shall be stored and handled to avoid contamination 
prior to assembly and brazing. [NFPA 99:5.1.10.5.3.1] 

The exterior surfaces of tube ends shall be 
cleaned prior to brazing to remove any surface 
oxides. [NFPA 99:5.1.10.5.3.2] 

When cleaning the exterior surfaces of tube 
ends, no matter shall be permitted to enter the tube. 
[NFPA 99:5.1.10.5.3.3] 

If the interior surfaces of fitting sockets become 
contaminated prior to brazing, they shall be 
recleaned for oxygen in accordance with Section 
1317.1 and be cleaned for brazing with a clean, oil- 
free wire brush. [NFPA 99:5.1.10.5.3.4] 

Clean, nonshedding, abrasive pads shall be used 
to clean the exterior surfaces of tube ends. [NFPA 
99:5.1.10.5.3.5] 

The use of steel wool or sand cloth shall be 
prohibited. [NFPA 99:5.1.10.5.3.6] 

The cleaning process shall not result in grooving 
of the surfaces to be joined. [NFPA 99:5.1.10.5.3.7] 

After being abraded, the surfaces shall be wiped 
using a clean, lint-free white cloth. [NFPA 
99:5.1.10.5.3.8] 

Tubes, fittings, valves, and other components 
shall be visually examined internally before being 
joined, to verify that they have not become contami- 
nated for oxygen service and that they are free of 
obstructions or debris. [NFPA 99:5.1.10.5.3.9] 

The interior surfaces of tube ends, fittings, and 
other components that were cleaned for oxygen 
service by the manufacturer, but become contami- 
nated prior to being installed, shall be permitted to 
be recleaned on-site by the installer by thoroughly 



1319.1 -1319.5 

scrubbing the interior surfaces with a clean, hot 
water-alkaline solution, such as sodium carbonate or 
trisodium phosphate one (1) pound to three (3) 
gallons (450 g to 11 L) of potable water and thor- 
oughly rinsing them with clean, hot potable water. 
[NFPA 99:5.1.10.5.3.10] 

Other aqueous cleaning solutions shall be 
permitted to be used for on-site recleaning permitted 
in NFPA 99:5.1.10.5.3.10, provided that they are as 
recommended in CGA Pamphlet G-4.1, Cleaning 
Equipment for Oxygen Service, and are listed in CGA 
Pamphlet 02-DIR, Directory of Cleaning Agents for 
Oxygen Service. [NFPA 99:5.1.10.5.3.11] 

Material that has become contaminated inter- 
nally and is not clean for oxygen service shall not be 
installed. [NFPA 99:5.1.10.5.3.12] 

Joints shall be brazed within eight (8) hours after 
the surfaces are cleaned for brazing. [NFPA 
99:5.1.10.5.3.13] 

1319.4 Flux shall only be used when brazing dissim- 
ilar metals such as copper and bronze or brass, using 
a silver (BAg series) brazing filler metal. [NFPA 
99:5.1.10.5.4.1] 

Surfaces shall be cleaned for brazing in accor- 
dance with Section 1319.3. [NFPA 99:5.1.10.5.4.2] 

Flux shall be applied sparingly to minimize 
contamination of the inside of the tube with flux. 
[NFPA 99:5.1.10.5.4.3] 

The flux shall be applied and worked over the 
cleaned surfaces to be brazed using a stiff bristle 
brush to ensure complete coverage and wetting of 
the surfaces with flux. [N*FPA 99:5.1.10.5.4.4] 

Where possible, short sections of copper tube 
shall be brazed onto the noncopper component and 
the interior of the subassembly shall be cleaned of 
flux prior to installation in the piping system. [NFPA 
99:5.1.10.5.4.5] 

On joints DN20 (NPS 3/4) (7/8 in. O.D.) size 
and smaller, flux-coated brazing rods shall be 
permitted to be used in lieu of applying flux to the 
surfaces being joined. [NFPA 99:5.1.10.5.4.6] 

1319.5 Tube ends shall be inserted fully into the 
socket of the fitting. [NFPA 99:5.1.10.5.6.1] 

Where flux is permitted, the joint shall be heated 
slowly until the flux has liquefied. [NFPA 
99:5.1.10.5.6.2] 

After flux is liquefied, or where flux is not 
permitted to be used, the joint shall be heated 
quickly to the brazing temperature, taking care not 
to overheat the joint. [NFPA 99:5.1.10.5.6.3] 

Techniques for heating the joint; applying the 
brazing filler metal; and making horizontal, vertical, 



225 



1319.5-1320.1 



UNIFORM PLUMBING CODE 



and large-diameter joints shall be as stated in 
sections on Applying Heat and Brazing and Hori- 
zontal and Vertical Joints in Chapter VII, Brazed 
Joints, in the CD A Copper Tube Handbook. [NFPA 
99:5.1.10.5.6.4] 

1319.6 When being brazed, joints shall be continu- 
ously purged with oil-free, dry nitrogen NF to 
prevent the formation of copper oxide on the inside 
surfaces of the joint. [NFPA 99:5.1.10.5.5.1] 

The source of the purge gas shall be monitored, 
and the installer shall be audibly alerted when the 
source content is low. [NFPA 99:5.1.10.5.5.2] 

The purge gas flow rate shall be controlled by 
the use of a pressure regulator and flow meter or 
combination thereof. [NFPA 99:5.1.10.5.5.3] 

Pressure regulators alone shall not be used to 
control purge gas flow rates. [NFPA 99:5.1.10.5.5.4] 

In order to assure that all ambient air has been 
removed from the pipeline prior to brazing, an 
oxygen analyzer shall be used to verify the effective- 
ness of the purge. The oxygen analyzer shall read 
below 1 percent oxygen concentration before brazing 
is to begin. [NFPA 99:5.1.10.5.5.5] 

During and after installation, openings in the 
piping system shall be kept sealed to maintain a 
nitrogen atmosphere within the piping to prevent 
debris or other contaminants from entering the 
system. [NFPA 99:5.1.10.5.5.6] 

While a joint is being brazed, a discharge 
opening shall be provided on the opposite side of the 
joint from where the purge gas is being introduced. 
[NFPA 99:5.1.10.5.5.7] 

The flow of purge gas shall be maintained until 
the joint is cool to the touch. [NFPA 99:5.1.10.5.5.8] 

After the joint has cooled, the purge discharge 
opening shall be sealed to prevent contamination of 
the inside of the tube and maintain the nitrogen 
atmosphere within the piping system. [NFPA 
99:5.1.10.5.5.9] 

The final connection of new piping to an 
existing, in-use pipeline shall be permitted to be 
made without the use of a nitrogen purge. [NFPA 
99:5.1.10.5.5.10] 

After a final connection in a positive-pressure 
medical gas pipeline is made without a nitrogen 
purge, an outlet in the immediate downstream zone 
of the affected portions of both the new and existing 
in-use piping shall be tested in accordance with 
NFPA 99:5.1.12.3.9, Final Tie-in Test. [NFPA 
99:5.1.10.5.5.11] 

When using the autogenous orbital welding 
process, joints shall be continuously purged inside 



and outside with inert gas(es) in accordance with the 
qualified welding procedure. [NFPA 99:5.1.10.5.5.12] 

1319.7 After brazing, the outside of all joints shall be 
cleaned by washing with water and a wire brush to 
remove any residue and permit clear visual inspec- 
tion of the joint. [NFPA 99:5.1.10.5.7.1] 

Where flux has been used, the wash water shall 
be hot. [NFPA 99:5.1.10.5.7.2] 

Each brazed joint shall be visually inspected 
after cleaning the outside surfaces. [NFPA 
99:5.1.10.5.7.3] 

Joints exhibiting the following conditions shall 
not be permitted: 

(1) Flux or flux residue (when flux or flux-coated 
BAg series rods are used with dissimilar metals). 

(2) Base metal melting or erosion. 

(3) Unmelted filler metal. 

(4) Failure of the filler metal to be clearly visible all 
the way around the joint at the interface between 
the socket and the tube. 

(5) Cracks in the tube or component. 

(6) Cracks in the brazed filler metal. 

(7) Failure of the joint to hold the test pressure 
under the installer-performed initial pressure 
test (Section 1327.10) and standing pressure test 
(Section 1327.11). [NFPA 99:5.1.10.5.7.4 ] 

Brazed joints that are identified as defective 
under conditions of Section 1319.7(2) or (5) shall be 
replaced. [NFPA 99:5.1.10.5.7.5] 

Brazed joints that are identified as defective 
under Sections 1319.7(1), (3), (4), (6), or (7) shall be 
permitted to be repaired, except that no joint shall be 
reheated more than once before being replaced. 
[NFPA 99:5.1.10.5.7.6] 

1320.0 Valves - Requirements, Locations, and 
Labeling. 

1320.1 General Requirements. Shutoff valves 
accessible to other than authorized personnel shall 
be installed in valve boxes with frangible or remov- 
able windows large enough to permit manual opera- 
tion of valves. [NFPA 99:5.1.4.2.1] 

Shutoff valves for use in certain areas, such as 
psychiatric or pediatric, shall be permitted to be 
secured with the approval of the Authority Having 
Jurisdiction to prevent inappropriate access. [NFPA 
99:5.1.4.2.2] 

1320.1.1 Where valves are concealed in any 
enclosure, the door or entry to the enclosure 
shall be identified and color coded with the type 
of gas service installed, as described in Section 



226 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

1323.0. Enclosures shall* be of sufficient size to 
permit valve operation. Valve handles in the off 
position shall prevent closure of the access panel 
or door. 

1320.2 In-line shutoff valves intended for use to 
isolate piping for maintenance or modification shall 
meet the following requirements: 

(1) Be located in a restricted area. 

(2) Be locked or latched open. 

(3) Be identified in accordance with Section 1323.0 
[NFPA 99:5.1.4.9.1] 

1320.3 Shutoff valves provided for the connection of 
future piping shall meet the following requirements: 

(1) Be locked in a restricted area. 

(2) Be locked or latched closed. 

(3) Be identified in accordance with Section 
1323.0 [NFPA 99:5.1.4.10] 

1320.3.1 Future connection valves shall be 
labeled as to gas content. [NFPA 99:5.1.4.10.1] 

1320.3.2 Downstream piping shall be closed 
with a brazed cap with tubing allowance for 
cutting and rebrazing. [NFPA 99:5.1.4.10.2] 

1320.3.3 A zone valve shall be located immedi- 
ately outside each vital life-support critical care, 
and anesthetizing location in each medical gas 
and /or vacuum line, and located so as to be 
readily accessible in an emergency. [NFPA 
99:5.1.4.8.7] 

1320.3.4 Gas-delivery columns, hose reels, 
ceiling tracks, control panels, pendants, booms, 
or other special installations shall be located 
downstream of the zone valve. [NFPA 
99:5.1.4.8.7.1] 

1320.3.5 Zone valves shall be so arranged that 
shutting off the supply of gas to any one (1) 
operating room or anesthetizing location will 
not affect the others. [NFPA 99:5.1.4.8.7.2] 

1320.4 Source Valve. A shutoff valve shall be 
placed at the immediate connection of each source 
system to the distribution piping to permit the entire 
source, including all. accessory devices (such as hair 
dryers, final line regulators, etc.), to be isolated from 
the facility. [NFPA 99:5.1.4.4] 

1320.4.1 The source valve shall be located in the 
immediate vicinity of the source equipment. 
[NFPA 99:5.1.4.4.1] 

1320.4.2 The source valve shall be labeled in 
accordance with Section 1323.0, Source Valve for 
the (Source Name). [NFPA 99:5.1.4.4.2, 5,1.11.2.3] 

1320.5 Main Valve. A shutoff valve shall be 
provided in the main supply line inside of the 



1320.1-1320.8 

building, except where one or more of the following 
conditions exist: 

(1) The source and source valve are located inside 
the building served. 

(2) The source system is physically mounted to the 
wall of the building served and the pipeline 
enters the building in the immediate vicinity of 
the source valve. [NFPA 99:5.1.4.5] 

1320.5.1 The main line valve shall be located to 
permit access by authorized personnel only (i.e., 
by locating above a ceiling or behind a locked 
access door). [NFPA 99:5.1.4.5.1] 

1320.5.2 The main line valve shall be located on 
the facility side of the source valve and outside 
of the source room, enclosure, or where the main 
line first enters the building. [NFPA 99:5.1.4.5.2] 

1 320.5.3 The main line shall be labeled in accor- 
dance with Section 1323.0. [NFPA 99:5.1.4.5.3 
and 5.1.11.2.4] 

1320.6 Riser Valve. Each riser supplied from the 
main line shall be provided with a shutoff valve 
adjacent to the riser connection. Riser valves shall be 
permitted to be located above ceilings, but shall 
remain accessible and not be obstructed. [NFPA 
99:5.1.4.6,5.1.4.6.1] 

1320.7 Zone Valve. Station outlets/ inlets shall be 
supplied through a zone valve as follows: 

(1) The zone valve shall be placed such that a wall 
intervenes between the valve and outlets /inlets 
that it controls. 

(2) The zone valve shall serve only outlets /inlets 
located on that same story. [NFPA 99:5.1.4.8] 

1320.7.1 Zone valves shall be readily operable 
from a standing position in the corridor on the 
same floor they serve. [NFPA 99:5.1.4.8.1] 

1320.7.2 Zone valves shall be so arranged that 
shutting off the supply of medical gas or 
vacuum to one (1) zone will not affect the supply 
of medical gas or vacuum to another zone or the 
rest of the system. [NFPA 99:5.1.4.8.2] 

1320.8 Service Valves. Service valves shall be 
placed in the branch piping prior to any zone valve 
box assembly on that branch. [NFPA 99:5.1.4.7.2] 

1320.8.1 Only one (1) service valve shall be 
required for each branch off of a riser regardless 
of how many zone valve boxes are installed on 
that lateral. [NFPA 99:5.1.4.7.1] 

1320.8.2 Service valves shall be installed to 
allow servicing or modification of lateral branch 
piping from a main or riser without shutting 
down the entire main, riser, or facility. [NFPA 
99:5.1.4.7] 



227 



1321.0-1323.4 



UNIFORM PLUMBING CODE 



1321.0 Pressure-Regulating Equipment. 

1321.1 Pressure-regulating equipment shall be 
installed in the supply main upstream of the final 
line-pressure valve. Where multiple piping systems 
for the same gas at different operating pressures are 
required, separate pressure-regulating equipment, 
relief valves, and source shutoff valves shall be 
provided for each pressure. 

1321.2 Each central supply system shall have a pres- 
sure-relief valve set at 50 percent above normal line 
pressure, installed downstream of the pressure regu- 
lator and upstream of any shutoff valve. This pres- 
sure-relief valve shall be permitted to be set at a 
higher pressure, provided another pressure-relief 
valve set at 50 percent above normal line pressure is 
installed in the main supply line. 

1321.2.1 Pressure-relief valves shall close auto- 
matically when excess pressure has been 
released. 

1321.2.2 Pressure-relief valves set at 50 percent 
shall be vented to the outside from gas systems, 
except medical air, or if the total capacity of the 
supply system is in excess of three-thousand 
(3,000) cubic feet (85 m 3 ) of gas. 

1321.2.3 Pressure-relief valves shall be of brass 
or bronze and specially designed for the gas 
service involved. 

1321.2.4 A pressure-relief valve shall not be 
isolated from its intended use by any valve. 

1321.3 Pressure Gauges. Pressure and vacuum 
indicators shall be readable from a standing position. 
Pressure /vacuum indicators shall be provided at the 
following locations, as a minimum: 

(1) Adjacent to the alarm-initiating device for source 
main-line pressure and vacuum alarms in the 
master alarm system. 

(2) At or in area alarm panels to indicate the pres- 
sure/vacuum at the alarm activating device for 
each system that is monitored by the panel. 

(3) On the station outlet /inlet side of zone valves. 
[NFPA 99:5.1.8.2.1, 5.1.8.2.2] 

1 322.0 Station Outlets/Inlets. 

Station outlets and inlets shall be installed in strict 
accordance with the manufacturers instructions. 

1322.1 After installation of the piping, but before 
installation of the station outlets/ inlets and other 
medical gas and medical gas system components 
(e.g., pressure-actuating switches for alarms, mani- 
folds, pressure gauges, or pressure relief valves), the 
line shall be blown clear by means of oil-free, dry 
nitrogen. 



1323.0 Labeling and Identification. 

The gas content of medical gas piping systems shall 
be readily identifiable by appropriate labeling with 
the name and pressure contained. Such labeling shall 
be by means of metal tags, stenciling, stamping, or 
adhesive markers, in a manner that is not readily 
removable. Where supplementary color identifica- 
tion of piping is used, it shall be in accordance with 
the gases and colors indicated in CGA Pamphlet C-9, 
Standard Color-Marking of Compressed Cylinders 
Intended for Medical Gas Use, See Table 13-1. 

1323.1 Piping shall be labeled by stenciling or adhe- 
sive markers that identify the medical gas, support 
gas, or vacuum system and include: 

(1) The name of the gas /vacuum system or the 
chemical symbol per Table 13-1. 

(2) The gas or vacuum system color code per Table 
13-1. 

(3) Where positive-pressure gas piping systems 
operate at pressures other than the standard 
gauge in Table 13-1, the pipe labeling shall 
include the operating pressure in addition to the 
name of the gas. [NFPA 99:5.1.11.1.1] 

Pipe labels shall be located as follows: 

(1) At intervals of not more than twenty (20) feet 
(6,100 mm). 

(2) Not less than once in or above every room. 

(3) On both sides of walls or partitions penetrated by 
the piping. 

(4) Not less than once in every story height 
traversed by risers. [NFPA 99:5.1.11.1.2] 

1323.2 Shutoff valves shall be identified as follows: 

(1) The name or chemical symbol for the specific 
medical gas or vacuum system. 

(2) The room or areas served. 

(3) A caution to not close or open valve except in 
emergency. [NFPA 99:5.1.11.2.1] 

1323.3 Station outlets and inlets shall be identified as 
to the name or chemical symbol for the specific 
medical gas or vacuum provided. [NFPA 
99:5.1.11.3.1] 

1323.4 The shutoff valves described in Sections 
1320.4, 1320.5, and 1320.6 shall be labeled to reflect 
the rooms that are controlled by such valves. 
Labeling shall be kept current from initial construc- 
tion through acceptance. Valves shall be labeled in 
substance as follows: 

In-line shutoff valves shall be labeled in substance 
as follows: 

CAUTION 

(NAME OF MEDICAL GAS) VALVE 

DO NOT CLOSE EXCEPT IN EMERGENCY 

THIS VALVE CONTROLS SUPPLY TO... 



228 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

Source valves shall be labeled in substance as 
follows: 

SOURCE VALVE 

FOR THE (SOURCE NAME). 

Main line valves shall be labeled in substance as 
follows: 

MAIN LINE VALVE FOR THE 

(GAS/VACUUM NAME) SERVING THE 

(NAME OF BUILDING). 

Riser valve(s) shall be labeled in substance as 
follows: 

RISER FOR THE (GAS/VACUUM NAME) 

SERVING (NAME OF THE AREA/BUILDING 

SERVED BY THE PARTICULAR RISER). 

Service valve(s) shall be labeled in substance as 
follows: 

SERVICE VALVE FOR THE 

(GAS/VACUUM NAME) SERVING 

(NAME OF THE AREA/BUILDING 

SERVED BY THE PARTICULAR VALVE). 

[NFPA 99:5.1.11.2.6] 

1324.0 Alarms. 

Master, area, and local alarm systems used for medical 
gas and vacuum systems shall include the following : 

(1) Separate visual indicators for each condition 
monitored, except as permitted for local alarms 
that are displayed on master alarm panels. 

(2) Visual indicators that remain in alarm until the 
situation that has caused the alarm is resolved. 

(3) A cancelable audible indication of each alarm 
condition that produces a sound with a 
minimum level of not less than eighty (80) deci- 
bels at three (3) feet (920 mm). 

(4) A means to visually identify a lamp or LED 
failure. 

(5) Visual and audible indication that the wiring to 
an alarm initiating device is disconnected. 

(6) Labeling of each indicator, indicating the condi- 
tion monitored. 

(7) Labeling of each alarm panel for its area of 
surveillance. 

(8) Reinitiation of the audible signal if another 
alarm condition occurs while the audible alarm 
is silenced. 

(9) Power for master and area alarms from the life 
safety branch of the emergency electrical system 
as described in NFPA 99 Chapter 4, Electrical 
Systems. 



1323.4-1325.1 

(10) Power for local alarms, dew point sensors, and 
carbon monoxide sensors permitted to be from 
the same essential electrical branch as is used to 
power the air compressor system. 

(11) Wiring from switches or sensors that is super- 
vised or protected as required by Section 
517.30(C)(3) of NFPA 70, National Electrical Code, 
for emergency system circuits. 

(12) Assurance by the responsible authority of the 
facility that the labeling of alarms, where room 
numbers or designations are used, is accurate 
and up-to-date. 

(13) Provisions for automatic restart after a power 
loss of ten (10) seconds (e.g., during generator 
startup) without giving false signals or requiring 
manual reset. [NFPA 99:5.1.9.1] 

1324.1 Functioning of alarm components shall be 
verified in accordance with testing and monitoring 
requirements of the manufacturer and the Authority 
Having Jurisdiction. 

1325.0 Medical Air System. 

Medical air compressors shall be installed in a well- 
lit, ventilated, and clean location and shall be acces- 
sible. The location shall be provided with drainage 
facilities. The medical air compressor area shall be 
located separately from medical gas cylinder system 
sources, and shall be readily accessible for mainte- 
nance. 

1325.1 Medical air compressors shall be sufficient to 
serve the peak calculated demand with the largest 
single compressor out of service. In no case shall 
there be less than two (2) compressors. [NFPA 
99:5.1.3.5.11.2] 

Medical air compressor systems shall consist of 
the following: 

(1) Components complying with NFPA 99:5.1.3.5.4 
through NFPA 99:5.1.3.5.10, arranged per NFPA 
99:5.1.3.5.11. 

(2) An automatic means to prevent backflow from 
on-cycle compressors through off-cycle compres- 
sors. 

(3) A manual shutoff valve to isolate each 
compressor from the centrally piped system and 
from other compressors for maintenance or 
repair without loss of pressure in the system. 

(4) Intake filter-mufflers of the dry type. 

(5) Pressure relief valves set at 50 percent above line 
pressure. 

(6) Piping between the compressor and the source 
shutoff valve compatible with oxygen that does 
not contribute to contaminant levels. [NFPA 
99:5.1.3.5.3.2] 



229 



1325.1 -1326.1 



UNIFORM PLUMBING CODE 



(7) Except as defined in NFPA 99:5.1.3.5.3.2(1) 
through NFPA 99:5.1.3.5.3.2(6), materials and 
devices used between the medical air intake and 
the medical air source valve shall be permitted 
to be of any design or construction appropriate 
for the service, as determined by the manufac- 
turer. [NFPA 99:5.1.3.5.3.2] 

1 325.2 The medical air compressors shall draw their 
air from a source of clean air located where no 
contamination is anticipated from engine exhausts, 
fuel storage vents, medical-surgical vacuum system 
discharges, particulate matter, or odor of any type. 
[NFPA 99:5.1.3.5.13.1] 

1325.3 Compressor intake piping shall be hard- 
drawn seamless copper, and one of the following: 

(1) ASTM B 88, Standard Specification for Seamless 
Copper Water Tube, (Types K or L). 

(2) ASTM B 280, Standard Specification for Seamless 
Copper Tubing for Air Conditioning and Refrigera- 
tion Field Service (Copper ACR tube). [NFPA 
99:5.1.3.5.13.4] 

(3) ASTM B 819, Standard Specification for Seamless 
Copper Tube for medical Gas Systems, (Types K or 
L). 

The compressor air intake shall be located 
outdoors above roof level, at a minimum distance 
not less than of ten (10) feet (3,050 mm) from any 
door, window, exhaust, other intake, or opening in 
the building and a distance of not less than twenty 
(20) feet (6,100 mm) above ground. [NFPA 
99:5.1.3.5.13.2] 

If an air source equal to or better than outside air 
(e.g., air already filtered for use in operating room 
ventilating systems) is available, it shall be permitted 
to be used for the medical air compressors with the 
following provisions: 

(1) This alternate source of supply air shall be avail- 
able on a continuous twenty-four (24) hours-per- 
day, seven (7) days-per-week basis. 

(2) Ventilating systems having fans with motors or 
drive belts located in the air stream shall not be 
used as a source of medical air intake. [NFPA 
99:5.1.3.5.13.3] 

Air intakes for separate compressors shall be 
permitted to be joined together to one (1) common 
intake where the following conditions are met: 

(1) The common intake is sized to minimize back 
pressure in accordance with the manufacturer's 
recommendations. 

(2) Each compressor can be isolated by manual or 
check valve, blind flange, or tube cap to prevent 
open inlet piping when compressors are 
removed from service and consequent backflow 
of room air into the other compressor(s). [NFPA 
99:5.1.3.5.13.5] 



1325.3.1 Each medical air compressor shall have 
an isolation valve installed so that shutting off or 
failure of the largest unit will not affect the oper- 
ation of the other unit(s). 

1325.4 Drains shall be installed on dryers, after- 
coolers, separators, and receivers. 

1325.5 Medical air receivers shall be provided with 
proper valves to allow the flow of compressed air to 
enter and exit out of separator receiver ports during 
normal operation and allow the receiver to be by- 
passed during service, without shutting down the 
medical air system. [NFPA 99:5.1.3.5.11.4] 

1325.6 Medical Air Receivers. Receivers for 

medical air shall meet the following requirements: 

(1) Be made of corrosion-resistant materials or 
otherwise be made corrosion resistant. 

(2) Comply with Section VIII, Unfired Pressure 
Vessels, of the ASME Boiler and Pressure Vessel 
Code. 

(3) Be equipped with a pressure-relief valve, auto- 
matic drain, manual drain, sight glass, and pres- 
sure indicator. 

(4) Be of a capacity sufficient to prevent the 
compressor from short cycling. [NFPA 
99:5.1.3.5.6] 

Piping within compressor systems upstream 
of the source shutoff valve shall comply with 
Sections 1316.0 and 1319.0, except that stainless 
steel shall be permitted to be used as a piping 
material. 

1326.0 Medical Vacuum Pump System. 

The vacuum plant shall be installed in a well-lit, venti- 
lated, and clean location with ample accessibility. The 
location shall be provided with drainage facilities. The 
vacuum plant, when installed as a source, shall be 
located separately from other medical vacuum system 
sources, and shall be readily accessible for mainte- 
nance. 

1326.1 Medical-surgical vacuum sources shall 
consist of the following: 

(1) Two (2) or more vacuum pumps sufficient to 
serve the peak calculated demand with the 
largest single vacuum pump out of service. 

(2) An automatic means to prevent backflow from 
any on-cycle vacuum pumps through any off- 
cycle vacuum pumps. 

(3) A shutoff valve or other isolation means to 
isolate each vacuum pump from the centrally 
piped system and other vacuum pumps for 
maintenance or repair without loss of vacuum in 
the system. 



230 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

(4) A vacuum receiver. 

(5) Piping between the vacuum pump(s), 
discharge(s), receiver(s), and the vacuum source 
shutoff valve shall be in accordance with 1316.3, 
except that stainless, galvanized, or black steel pipe 
shall be permitted to be used. 

(6) Except as defined in NFPA 99:5.1.3.6.1.2(1)' 
through NFPA 99:5.1.3.6.1.2(5), materials and 
devices used between the medical vacuum 
exhaust and the medical vacuum source shall be 
permitted to be of any design or construction 
appropriate for the service, as determined by the 
manufacturer. [NFPA 99 5.1.3.6.1.2(1); (2), '(3), 
(4), (5), (6)] 

1326.1.1 Additional pumps shall automatically 
activate when the pumps in operation are inca- 
pable of adequately maintaining the required 
vacuum. 

Automatic or manual alternation of pumps 
shall allow division of operating time. If auto- 
matic alternation of pumps is not provided, the 
facility staff shall arrange a schedule for manual 
alternation. [NFPA 99:5.1.3.6.6.1, 5.1.3.6.6.2] 

1326.2 The medical-surgical vacuum pumps shall 
exhaust in a manner and location that will minimize 
the hazards of noise and contamination to the facility 
and its environment. 

The exhaust shall be located as follows: 

(1) Outdoors. 

(2) Not less than ten (10) feet (3,050 mm) from 
any door, window, air intake, or other open- 
ings in buildings. 

(3) At a level different from air intakes. 

(4) Where prevailing winds, adjacent buildings, 
topography, or other influences that would 
not divert the exhaust into occupied areas or 
prevent dispersion of the exhaust. 

The end of the exhaust shall be turned down 
and screened or otherwise be protected against 
the entry of vermin, debris, or precipitation by 
screening fabricated or composed of a non- 
corroding material. 

The exhaust shall be piped of materials 
approved for medical-surgical vacuum piping 
under Section 1316.3 (Vacuum tubes). 

The exhaust shall be free of dips and loops 
that might trap condensate or oil. Where such low 
points are unavoidable, a drip leg and valved 
drain shall be installed. [NFPA 99:5.1.3.6.7.1 - 
5.1.3.6.7.5] 

1326.2.1 Vacuum exhausts from multiple 
pumps shall be permitted to be joined together 



1326.1 -1327.1 

to one (1) common exhaust where the following 
conditions are met: 

(1) The common exhaust is sized to minimize 

back-pressure in accordance with the pump 
manufacturer's recommendations. 

(2) Each pump can be isolated by manual or 
check valve, blind flange, or tube cap to 
prevent open exhaust piping when pumps 
are removed for service and consequent 
flow of exhaust air into the room. [NFPA 
99:5.1.3.67.6] 

1326.3 Receivers for vacuum shall meet the 
following requirements: 

(1) Be made of ferrous and /or nonferrous materials. 

(2) Comply with Section VIII, Unfired Pressure 
Vessels, of the ASME Boiler and Pressure Vessel 
Code. 

(3) Be capable of withstanding a gauge pressure of 
sixty (60) psi (415 kPa) and twenty-nine and 
nine-tenths (29.9) inch (760 mm) gauge HgV. 

(4) Be equipped with a manual drain. 

(5) Be of a capacity based on the technology of the 
pumps. [NFPA 99:5.1.3.6.3] 

1326.4 Piping between vacuum pumps, discharges, 
receivers, and the vacuum main line valve shall be in 
accordance with Section 1316.3, except that stainless, 
galvanized, or black steel pipe shall be permitted to 
be used. [NFPA 99:5.1.3.6.1.2(5)] 

1326.5 Drains shall be installed and terminate in an 
approved location. 

1327.0 Testing and Inspection. 

1327.1 Inspection and testing shall be performed on 
new piped gas systems, additions, renovations, tempo- 
rary installations, or repaired systems, to ensure the 
facility, by a documented procedure, that the appli- 
cable provisions of this document have been adhered 
to and system integrity has been achieved or main- 
tained. [NFPA 99:5.1.12.1.1.] 

1327.1.1 Tests and inspections required by this 
section shall not be interpreted to conflict with 
the requirements of NFPA 99, Standard for Health 
Care Facilities. Final certification or verification 
shall require the completion of tests and inspec- 
tions required by Sections 4-3.4.1.1, 4-3.4.1.2, and 
4-3.4.1.3 of NFPA 99, Standard for Health Care 
Facilities. For requirements of the portions of 
medical gas and medical vacuum systems 
testing and inspection not addressed in this 
chapter or medical gas and medical vacuum 
systems testing and inspection beyond the scope 
of this chapter, refer to NFPA 99, Standard for 
Health Care Facilities. 



231 



1327.2-1327.9 



UNIFORM PLUMBING CODE 



1327.2 Systems that are breached and components 
that are subject to additions, renovations, or replace- 
ment (e.g., new gas sources: bulk, manifolds, 
compressors, dryers, alarms) shall be inspected and 
appropriately tested. [NFPA 99:5.1.12.1.3] 

1327.2.1 Systems shall be deemed breached at 
the point of pipeline intrusion by physical sepa- 
ration, by system component removal, replace- 
ment, or addition. 

Breached portions of the systems subject to 
inspection and testing shall be confined to only 
the specific altered zone and components in the 
immediate zone or area that is located upstream 
for vacuum systems and down stream for pres- 
sure gases at the point or area of intrusion. 
[NFPA 99:5.1.12.1.4, 5.1.12.1.5] 

1327.3 Advance Notice. It shall be the duty of the 
person doing the work authorized by the permit to 
notify the Authority Having Jurisdiction, orally or in 
writing, that said work is ready for inspection. Such 
notification shall be given not less than twenty-four 
(24) hours before the work is to be inspected. 

1327.4 Responsibility. The equipment, material, 
and labor necessary for inspection and testing shall 
be furnished by the permit holder or by the person 
who is requiring the inspection. 

1327.5 Testing. The test shall be conducted in the 
presence of the Authority Having Jurisdiction or a 
duly appointed representative. 

1327.6 Retesting. If the Authority Having Jurisdic- 
tion finds that the work does not pass tests, neces- 
sary corrections shall be made and the work shall 
then be resubmitted for test or inspection. 

1327.7 Initial Pressure Test - Piped Gas Systems. 

Before attachment of system components (e.g., pres- 
sure-actuating switches for alarms, manifolds, pres- 
sure gauges, or pressure-relief valves), but after instal- 
lation of the station outlets and inlets, with test caps in 
place, each section of the piping system shall be 
subjected to a test pressure of one and one-half (1-1 /2) 
times the working pressure [minimum one- hundred 
and fifty (150) psig (1 Mpa gauge)] with oil-free dry 
nitrogen. This test pressure shall be maintained until 
each joint has been examined for leakage by means of 
soapy water or other equally effective means of leak 
detection safe for use with oxygen. The source shutoff 
valve shall be closed. Leaks, if any, shall be located, 
repaired, and retested in accordance with this para- 
graph. [NFPA 99:5.1.12.2.3.7] 

1327.8 Cross-Connection Test - Piped Gas 
Systems. It shall be determined that no cross- 
connections exist between the various medical gas 
and vacuum piping systems.. [NFPA 99:5.1.12.2.4] 



Piping systems shall be reduced to atmospheric 
pressure. [NFPA 99:5.1.12.2.4.1] 

Sources of test gas shall be disconnected from 
piping systems except for the one (1) system being 
tested. [NFPA 99:5.1.12.2.4.2] 

The system under test shall be charged with 
oil-free, dry nitrogen NF to a gauge pressure of 
fifty (50) psi (345 kPa). [NFPA 99:5.1.12.2.4.3] 

After the installation of the individual faceplates 
with appropriate adapters matching outlet /inlet 
labels, each individual outlet /inlet in each installed 
medical gas and vacuum piping system shall be 
checked to determine that the test gas is being 
dispensed only from the piping system being tested. 
[NFPA 99:5.1.12.2.4.4] 

1327.8.1 The source of test gas shall be discon- 
nected, and the system tested shall be reduced to 
atmospheric pressure. The cross-connection test 
referenced in NFPA 99:5.1.12.2.4 shall be 
repeated for each installed medical gas and 
vacuum piping system. [NFPA 99:5.1.12.2.4.1, 
5.1.12.2.4.5] 

1327.8.2 Where a medical vacuum system is 
installed, the cross-connection testing shall 
include that piped vacuum system with medical 
gas-piping systems. 

1327.8.3 Medical-surgical vacuum systems shall 
be in operation so that these vacuum systems are 
tested at the same time the medical gas systems 
are tested. The proper labeling and identification 
of system outlets /inlets shall be confirmed 
during these tests. [NFPA 99:5.1.12.2.4.6] 

1327.9 Final Testing Standing Pressure Test - 
Piped Gas Systems. After successful completion of 
the initial pressure tests under Section 1327.7, medical 
gas distribution piping shall be subject to a standing 
pressure test. [NFPA 99:5.1.12.2.6] 

Tests shall be conducted after the final installation 
of station outlet valve bodies, face plates, and other 
distribution system components (e.g., pressure alarm 
devices, pressure indicators, line pressure-relief 
valves, manufactured assemblies, hose, etc.). [NFPA 
99:5.1.12.2.6.1] 

The source valve shall be closed during this test. 
[NFPA 99:5.1.12.2.6.2] 

The piping systems shall be subjected to a twenty- 
four (24) hour standing pressure test using oil-free, dry 
nitrogen NF. [NFPA 99:5.1.12.2.6.3] 

Test pressures shall be 20 percent above the 
normal system operating line pressure. [NFPA 
99:5.112.2.6.4] 

1327.9.1 After the piping system is filled with 
test gas, the supply valve and all outlets shall be 



232 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

closed and the source of test gas disconnected. 
Tests shall be conducted after the final installa- 
tion of station outlet valve bodies, face plates, 
and other distribution system components (e.g., 
pressure alarm devices, pressure indicators, line 
pressure-relief valves, manufactured assemblies, 
hose, etc.). [NFPA 99:5.1.12.2.6.1] 

The source valve shall be closed during this 
test. [NFPA 99:5.1.12.2.6.2] 

The piping systems shall be subjected to a 
twenty-four (24) hour standing pressure test using 
oil-free, dry nitrogen NF. [NFPA 99:5.1.12.2.6.3] 

Test pressures shall be 20 percent above the 
normal system operating line pressure. [NFPA 
99:5.1.12.2.6.4] 

Leaks, if any, shall be located, repaired (if 
permitted), or replaced (if required), and retested. 
[NFPA 99:5.1.12.2.6.6] 

At the conclusion of the tests, there shall be 
no change in the test pressure other than that 
attributed to changes of ambient temperature. 
[NFPA 99:5.1.12.2.6.5] 

1327.10 Initial Pressure Test - Piped Vacuum 
Systems. Each section of the piping in medical gas 
and vacuum systems shall be pressure-tested. [NFPA 
99:5.1.12.2.3.1] 

Initial pressure tests shall be conducted as follows: 

(1) After installation of station outlets /inlets rough- 
in assemblies. Test caps shall be permitted to be 
used. 

(2) Prior to the installation of components of the 
distribution piping system that would be 
damaged by the test pressure (e.g., 
pressure/vacuum alarm devices, 
pressure /vacuum indicators, line pressure-relief 
valves, manufactured assemblies with flexible 
hose, etc.). [NFPA 99:5.1.12.2.3.2] 

The source shutoff valve shall remain closed 
during these tests. [NFPA 99:5.1.12.2.3.3] 

The test pressure for pressure gases shall be 
one and one-half (1.5) times the system working 
pressure not less than a gauge pressure of one- 
hundred and fifty (150) psi (1,035 kPa). [NFPA 
99:5.1.12.2.3.4] 

The test pressure for vacuum shall be not 
less than a gauge pressure of sixty (60) psi (415 
kPa). [NFPA 99:5.1.12.2.3.5] 

The test pressure shall be maintained until 
each joint has been examined for leakage by 
means of soapy water or other equally effective 
means of leak detection that is safe for use with 
oxygen. [NFPA 99:5.1.12.2.3.6] 



1327.9 -1327.12 

Leaks, if any, shall be located, repaired (if 
permitted), replaced (if required), and retested. 
[NFPA 99:5.1.12.2.3.7] 

1327.11 Standing Pressure Test - Piped Vacuum 
Systems. After successful completion of the initial 
pressure tests under Section 1327.10, vacuum distri- 
bution piping shall be subjected to a standing 
vacuum test. [NFPA 99:5.1.12.2.7] 

Tests shall be conducted after installation of 
components of the vacuum system. [NFPA 
99:5.1.12.2.7.1] 

The piping systems shall be subjected to a 
twenty-four (24) hour standing vacuum test. [NFPA 
99:5.1.12.2.7.2] 

Test pressure shall be between twelve (12) inch 
(300 mm) gauge HgV and full vacuum. [NFPA 
99:5.1.12.2.7.3] 

During the test, the source of test vacuum shall 
be disconnected from the piping system. [NFPA 
99:5.1.12.2.7.4] 

At the conclusion of the test, there shall be no 
change in the vacuum other than that attributed to 
changes of ambient temperature, as permitted in the 
following [NFPA 99:5.1.12.2.7.5]: 

Test vacuum changes due to expansion or 
contraction shall be permitted to be determined by 
means of the following pressure temperature rela- 
tionship: 

(1) The calculated final absolute pressure equals the 
initial absolute pressure times the final absolute 
temperature, divided by the initial absolute 
temperature. 

(2) Absolute pressure is the gauge pressure reading 
plus fourteen and seven-tenths (14.7) psi (101.4 
kPa). 

(3) Absolute temperature is the temperature 
reading plus 460°F (238°C). 

(4) The final allowable gauge pressure reading equals 
the final allowable absolute pressure minus a 
gauge pressure of fourteen and seven-tenths (14.7) 
psi (101.4 kPa). [NFPA 99:5.1.12.2.7.6] 

Leaks, if any, shall be located, repaired (if 
permitted), or replaced (if required), and retested. 
[NFPA 99:5.1.12.2.7.7] 

1327.12 Corrections. Notices of correction or viola- 
tion shall be written by the Authority Having Juris- 
diction and posted at the site of the work, mailed or 
delivered to the permittee or an authorized represen- 
tative. Refusal or failure to comply with any such 
notice or order within ten (10) days of receipt thereof 
shall be considered a violation of this code, and shall 
be subject to the penalties set forth elsewhere in this 
code for violations. 



233 



1327.13-1328.4 



UNIFORM PLUMBING CODE 



1327.13 Approval. Upon satisfactory completion of 
all tests and certification of the medical gas and 
medical vacuum systems, a certificate of approval 
shall be issued by the Authority Having Jurisdiction 
to the permittee. 

1327.14 Covering or Use. No medical gas or medical 
vacuum system or part thereof shall be covered, 
concealed, or put into use until it has been tested, 
inspected, and accepted as required in this code. 

1327.15 Uncovering. Any medical gas and vacuum 
system or part thereof that is covered or concealed 
before testing and inspected as required in this code 
shall be uncovered for inspection, after notice to 
uncover the work has been issued to the permittee or 
his authorized representative by the Authority 
Having Jurisdiction. 

1328.0 System Certification. 

1328.1 Prior to any medical gas system being placed 
in service, each and every system shall be certified, 
as described in Section 1328.2. 

1328.1.1 Verification tests shall be performed 
only after all tests required in Section 1327.0, 
Installer-Performed Tests, have been completed. 
[NFPA 99:5.1.12.3.1.1] 

Testing shall be conducted by a party techni- 
cally competent and experienced in the field of 
medical gas and vacuum pipeline testing and 
meeting the requirements of ASSE Standard 
6030, Medical Gas Verifiers Professional Qualifica- 
tions Standard. [NFPA 99:5.1.12.3.1.3] 

Testing shall be performed by a party other 
than the installing contractor. [NFPA 
99:5.1.12.3.1.4] 

When systems have been installed by in- 
house personnel, testing shall be permitted by 
personnel of that organization who meet the 
requirements of this section. [NFPA 
99:5.1.12.3.1.5] 

1328.2 Certification tests, verified and attested to by 
the certification agency, shall include the following: 

1328.2.1 Verifying compliance with the installa- 
tion requirements. 

1328.2.2 Testing and checking for leakage, 
correct zoning, and identification of control 
valves. 

1328.2.3 Checking for identification and 
labeling of pipelines, station outlets, and control 
valves. 

1328.2.4 Testing for cross-connection, flow rate, 
system pressure drop, and system performance. 

1328.2.5 Functional testing of pressure relief 
valves and safety valves. 



1328.2.6 Functional testing of all sources of 
supply. 

1328.2.7 Functional testing of alarm systems, 
including accuracy of system components. 

1328.2.8 Purge flushing of system and filling 
with specific source gases. 

1328.2.9 Testing for purity and cleanliness of 
source gases. 

1328.2.10 Testing for specific gas identity at 
each station outlet. 

1328.3 The inspection and testing reports shall be 
submitted directly to the party that contracted for the 
testing, who shall submit the report through chan- 
nels to the responsible facility authority and any 
others that are required. [NFPA 99:5.1.12.1.6] 

Reports shall contain detailed listings of all find- 
ings and results. [NFPA 99:5.1.12.1.7] 

1328.4 A report that includes the specific items 
mentioned in Section 1328.2 and other information 
required by NFPA 99, Standard for Health Care Facili- 
ties shall be delivered to the Authority Having Juris- 
diction prior to acceptance of the system. 



234 



HEALTH CARE FACILITIES AND Table 1 3-1 

MEDICAL GAS AND VACUUM SYSTEMS 

TABLE 13-1 
Standard Designation Colors and Operating Pressures for Gas and Vacuum Systems 

[NFPA 99: Table 5.1.11] 



Gas Service 



Abbreviated 
Name 



Colors 
(Background/Text) 



Standard 
Gauge Pressure 



Medical air 



Med Air 



Yellow /black 



50-55 psi 
(345-380 kPa) 



Carbon dioxide 



CCh 



Gray /black or 
gray / white 



50-55 psi 
(345-380 kPa) 



Helium 



He 



Brown /white 



50-55 psi 
(345-380 kPa) 



Nitrogen 



N ? 



Black /white 



160-185 psi 
(1,100-1,275 kPa) 



Nitrous oxide 



N 9 



Blue /white 



50-55 psi 
(345-380 kPa) 



Oxygen 



Oo 



Green /white or 
white /green 



50-55 psi 
(345-380 kPa) 



Oxygen /carbon 
dioxide mixture 



2 /C0 2 n 
(n is % of C0 2 ) 



Green /white 



50-55 psi 
(345-380 kPa) 



Medical-surgical vacuum 



Med Vac 



White /black 



15 in. to 30 in. HgV 
(360 mm to 760 mm) 



Waste anesthetic 
gas disposal 



WAGD 



Violet /white 



Varies with system type 



Other mixtures 



GasA%/GasB% 



Colors as above 

Major gas for background / 

minor gas for text 



None 



Nonmedical air 

(level 3 gas-powered device) 



Yellow-and-white diagonal 
stripe /black 



None 



Nonmedical and Level 3 
vacuum 



White-and-black diagonal 
stripe / black boxed 



None 



Laboratory air 
Laboratory vacuum 



Yellow-and-white 
checkerboard / black 

White-and-black 
checkerboard /black boxed 



None 



None 



Instrument air 



Red /white 



160-185 psi 
(1,100-1,275 kPa) 



235 



Table 13-2 -Table 13-3 



UNIFORM PLUMBING CODE 



TABLE 13-2 
Minimum Flow Rates 



Oxygen 

Nitrous Oxide 

Medical Compressed Air 

Nitrogen 

Vacuum 

Carbon Dioxide 

Helium 



.71 CFM per outlet 1 (20 LPM) 

.71 CFM per outlet 1 (20 LPM) 

.71 CFM per outlet 1 (20 LPM) 

15 CFM (0.42 m 3 /min.) free air per outlet 

1 SCFM (0.03 smVmin.) per inlet 2 

.71 CFM per outlet 1 (20 LPM) 

.71 CFM per outlet (20 LPM) 



Any room designed for a permanently located respiratory ventilator or anesthesia machine shall have an outlet capable of a flow 
rate of 180 LPM (6.36 CFM) at the station outlet. 
" For testing and certification purposes, individual station inlets shall be capable of a flow rate of 3 SCFM, while maintaining a 
system pressure of not less than 12 inches (305 mm) at the nearest adjacent vacuum inlet. 



TABLE 13-3 
Minimum Outlets/Inlets per Station 



Location 



Oxygen Medical Medical 
Vacuum Air 



Nitrous Nitrogen Helium Carbon 
Oxide Dioxide 



Patient rooms for 
medical / surgical, 
obstetrics, and pediatrics 

Examination / treatment 



1/bed 



1/bed 



1/bed 



for nursing units 


1/bed 


1/bed 


— 


Intensive care (all) 


3 /bed 


3 /bed 


2/bed 


Nursery 1 


2 /bed 


2 /bed 


1/bed 


General operating rooms 


2 /room 


3 /room 4 


2 /room 


Cystoscopic and invasive 


2 /room 


3 /room 4 


2 / room 


special procedures 








Recovery delivery and 


2 /bed 


2/bed 


1/bed 


labor/ delivery/ 


2 /room 


3 /room 4 


1 / room 


recovery rooms' 








Labor rooms 


1/bed 


1/bed 


1/bed 


First aid and emergency 


1/bed 


1/bed 4 


1/bed 


treatment 3 








Autopsy 


— 


1 / station 


1/ station 


Anesthesia workroom 


1 / station 


— 


1/ station 



1 / room 1 / room 



1 Includes pediatric nursery. 
" Includes obstetric recovery. 
3 Emergency trauma rooms used for surgical procedures shall be classified as general operating rooms. 

Vacuum inlets required are in addition to any inlets used as part of a scavenging system for removal of anesthetizing gases. 



236 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 



Table 13-4 -Table 13-5 



TABLE 13-4 
System Sizing - Flow Requirements for Station Inlet/Outlet 1 



Number of 

Inlet/Outlet Terminal 

Units per Facility 



Diversity Percentage 

of Average Flow per 

Inlet/Outlet Terminal Units 



Minimum Permissible 

System Flow 2 
SCFM (liters/minute) 

All Pressurized Vacuum 
Medical Gas Systems Systems 



1-10 
11-25 
26-50 
51-100 



100% 

75% 
50% 
50% 



Actual Demand See 

7.0 (200) Table 

13.1 (375) 13-5 
17.5(500) 



Flow rates of station inlets /outlets per Table 13-2. 

The minimum system flow is the average inlet /outlet flow times the number of station inlets /outlets times the diversity 

percentage. 



TABLE 13-5 
Outlet Rating for Vacuum Piping Systems 





Free-Air Allowance, 

Expressed as CFM (LPM) 

at 1 Atmosphere 


Zone Allowances 

Corridors-Risers 

Main Supply Line-Valves 


Location of Medical-Surgical 
Vacuum Outlets 


Per Room 


Per Outlet 


Simultaneous 

Usage, 
Factor Percent 


Air to Be 
Transported 
CFM (LPM)* 


Operating Rooms 

Major "A" (Radical, Open Heart) 
(Organ Transplant) 
(Radical Thoracic) 

Major "B"(A11 Other Major ORs) 

Minor 


3.5(99.1) 
3.5 (99.1) 
3.5 (99.1) 

2.0 (56.6) 

1.0(28.3) 


— 


100 
100 
100 

100 

100 


3.5 (99.1) 
3.5 (99.1) 
3.5 (99.1) 

2.0 (56.6) 

1.0 (28.3) 


Delivery Rooms 


1.0(28.3) 


- 


100 t 


1.0(28.3) 


Recovery Rooms (Post- 
Anesthesia) and 

Intensive Care Units (a minimum 
of 2 outlets per bed in each 
such department) 

1st outlet at each bed 
2nd outlet at each bed 
3rd outlet at each bed 
All others at each bed 


- 


3.0 (85.0) 
1.0 (28.3) 
1.0 (28.3) 
1.0 (28.3) 


50 
50 
10 
10 


1.5 (42.5) 
0.5 (14.2) 
0.1 (2.8) 
0.1 (2.8) 


Emergency Rooms 


- 


1.0 (28.3) 


100 


1.0 (28.3) 


Patient Rooms 
Surgical - 
Medical - 
Nurseries 




1.0 (28.3) 
1.0 (28.3) 
L0 (28.3) 


50 
10 
10 


0.5 (14.2) 
0.1 (2.8) 
0.1 (2.8) 


Treatment and Examining Rooms 


- 


0.5 (14.2) 


10 


0.05 (1.4) 


Autopsy Area 


- 


2.0 (56.6) 


20 


0.4 (11.3) 


Inhalation Therapy, Central 
Supply and Instructional Areas 


- 


1.0 (28.3) 


10 


0.1 (2.8) 



*Free air at 1 atmosphere 



237 



Table 13-6 -Table 13-7 



UNIFORM PLUMBING CODE 









" 


rABLE13-6 




















Size of Gas/Vacuum Piping 
















Maximum Delivery Capacity 3 in 


SCFM (LPM) 
















Length of Piping in Feel 


t(m) 1 












Medical 
System 


Gas Pipe 
Size Inch 2 


100 


(30) 


250 (76) 


500 


(152) 


750 


(228) 


1,000 


(304) 




1/2 


15.0 


(425) 


10.6 (300) 


7.4 


(209) 


5.9 


(167) 


5.1 


(144) 


Oxygen 


3/4 


40.0 


(1,133) 


28.3 (801) 


19.6 


(555) 


15.7 


(445) 


13.3 


(377) 




1 


50.0 


(1,416) 


50.0 (1,416) 


40.2 


(1,138) 


32.2 


(912) 


27.7 


(784) 




1/2 


15.0 


(425) 


9.5 (269) 


6.5 


(184) 


5.3 


(150) 


4.5 


(127) 


Nitrous Oxide 


3/4 


30.0 


(849) 


24.7 (699) 


17.1 


(484) 


13.7 


(388) 


11.7 


(331) 




1 


40.0 


(1413) 


40.0 (1,133) 


34.7 


(983) 


28.2 


(7,98) 


24.3 


(688) 




1/2 


18.1 


(512) 


11.1 (314) 


7.8 


(221) 


6.3 


(177) 


5.3 


(151) 


Medical Air 


3/4 


40.0 


(1,133) 


29.9 (847) 


21.0 


(595) 


16.5 


(467) 


14.1 


(399) 




1 


50.0 


(1,416) 


50.0 (1,416) 


42.1 


(1,192) 


35.8 


(1,013) 


29.2 


(826) 




1 


22.8 


(645) 


13.7 (388) 


9.5 


(269) 


7.6 


(215) 


6.5 


(184) 


Vacuum 


1-1/4 


40.1 


(1435) 


24.5 (694) 


16.7 


(473) 


13.3 


(377) 


11.2 


(317) 




1-1/2 


63.7 


(1,804) 


38.9 (1,101) 


26.8 


(759) 


21.1 


(600) 


17.9 


(507) 




2 


132.7 


(3,758) 


81.4 (2,305) 


56.0 


(1,586) 


45.0 


(1,274) 


38.3 


(1,084) 




1/2 


25.0 


(708) 


25.0 (708) 


25.0 


(708) 


23.8 


(674) 


20.6 


(583) 


Nitrogen 


3/4 


60.0 


(1,699) 


60.0 (1,699) 


60.0 


(1,699) 


60.0 


(1,699) 


54.2 


(1,535) 




1 


110.0 


(3,115) 


110.0 (3,115) 


110.0 


(3,115) 


110.0 


(3,115) 


110.0 


(3,115) 



Length of piping includes a 30% allowance for fittings. 
~ One-half inch (12.7 mm) diameter pipe is the minimum size allowed in medical gas systems. 
Based on the following maximum pressure drops: 
Oxygen, nitrous oxide, and medical air - 5 psig (10 in. Hg) 
Vacuum - 1.96 psig (4 in. Hg) 
Nitrogen - 20 psig (41 in. Hg) 



TABLE 13-7 

Maximum Pipe Support Spacing 

[NFPA 99:5.1 .10.10.4.5] 











Hanger Spacing 




Pipe 


Size 




ft. 


mm 


DN8 




(NPS1/4) 


(3/8in.O.D.) 


5 


1,520 


DN10 




(NPS 3/8) 


(l/2in.O.D.) 


6 


1,830 


DN15 




(NPS1/2) 


(5/8in.O.D.) 


6 


1,830 


DN20 




(NPS3/4) 


(7/8in.O.D.) 


7 


2,130 


DN25 




(NPS 1) 


(1-1/8 in. O.D.) 


8 


2,440 


DN32 




(NPS 1-1/4) 


(1-3/8 in. O.D.) 


9 


2,740 


DN40 




(NPS 1-1/2) 


(1-5/8 in. O.D.) 






and larger 






10 


3,050 


Vertical 


risers, 


all sizes 








Every floor but not to exceed: 




15 


4,570 



238 



CHAPTER 14 

REFERENCED STANDARDS 

TABLE 14-1 

Standards for Materials, Equipment, Joints and Connections 

Where more than one standard has been listed for the same material or method, 

the relevant portions of all such standards shall apply. 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


AHAMDW-1-2005* 


Household Electric Dishwashers 


Appliances 


401.1,404.4, 
1014.1.3 


AHAM FWD-1-2005 


Food Waste Disposers 


Appliances 


401.1, 404.4, 
1014.1.3 


APSP 1-2003* 


Public Swimming Pools 


Swimming Pools 
and Spas 


USPSHTC 


ASCE 25-2006 


Earthquake Actuated Automatic Gas Shutoff 
Devices 


Fuel Gas 


1209.10 


ASHRAE 90.1-2004* 


Energy Standard for Buildings Except Low-Rise 
Residential Buildings 


Miscellaneous 


501.0 


ASME A13.1-2007* 


Scheme for the Identification of Piping Systems 


Piping 


601.2 


ASMEA112.1. 2-2004* 


Air Gaps in Plumbing Systems (for Plumbing 
Fixtures and Water-Connected Receptors) 


Fittings 


Table 6-2, 
Table 6-3, 
603.2.1 


ASME Al 12.1. 3-2000 
(R2005)* 


Air Gap Fittings for Use with Plumbing 
Fixtures, Appliances, and Appurtenances 


Fittings 


Table 6-2, 
603.1,801.1, 
806.0, 807.4 


ASMEA112.3.1-1993* 


Performance Standard and Installation 
Procedures for Stainless Steel Drainage Systems 
for Sanitary, Storm, and Chemical Applications, 
Above and Below Ground (Note 1) 


Piping, Ferrous 


Table 7-1, 
701.1, 701.2, 
707.1, 


ASME A112.3.4-2000 
(R2004)* 


Macerating Toilet Systems and Related 
Components 


Fixtures 


710.13 


ASME A112.4.1-1993 
(R2002)* 


Water Heater Relief Valve Drain Tubes 


Appliances 


608.5 


ASME Al 12.4.2-2003* 


Water Closet Personal Hygiene Devices 


Fixtures 


406.1 


ASME Al 12.4.3-1999 
(R2004)* 


Plastic Fittings for Connecting Water Closets to 
the Sanitary Drainage System 


Fittings 


316.3 


ASME Al 12.4.7-2002* 


Point of Use and Branch Water Submetering 
Systems 


Miscellaneous 


301.0 


ASME A112.4.14-2004 


Manually Operated Quarter Turn Shutoff 
Valves for Use in Plumbing Systems Valves 


Valves, Metallic 
ball 


301.0 


ASME A112.6.1M-1997 
(R2002)* 


Floor-Affixed Supports for Off-the-Floor 
Plumbing Fixtures for Public Use 


Fixtures 


316.3.3, 407.4 


ASMEA112.6.2-2000 
(R2004)* 


Framing-Affixed Supports for Off-the-Floor 
Water Closets with Concealed Tanks 


Fixtures 


316.3, 407.4 


ASME A112.6.3-2001 
(R2007)* 


Floor and Trench Drains 


DWV Components 


411.0 


ASME A112.6.4-2003* 


Roof, Deck, and Balcony Drains 


DWV Components 


1105.1 


ASME A112.6.7-2001 
(R2007)* 


Enameled and Epoxy Coated Cast-Iron and 
PVC Plastic Sanitary Floor Sinks 


Fixtures 


Table 4-1 
footnote (9), 
401.1 



239 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASMEA112.6.9-2005* 


Siphonic Roof Drains 


DWV Components 


301.2 


ASMEA1 12.14.1-2003 


Backwater Valves 


Valves 


710.6 


ASMEA1 12.14.3-2000 
(R2004)* 


Grease Interceptors 


Fixtures 


1014.1, 1014.2 


ASMEA112.14.4-2001 
(R2007)* 


Grease Removal Devices 


Fixtures 


1014.2 


ASMEA112.14.6-2006* 


FOG (Fats, Oils, and Greases) Disposal Systems 


Fixtures 


1015.4 


ASMEA112.18.1-2005/ 
CSA B125.1-2005 


Plumbing Supply Fittings 


Fittings 


418.0, 

603.3.10, 

603.4.21 


ASMEA112.18.2-2005/ 
CSA B125.2-2005 


Plumbing Waste Fittings 


Fittings 


404.3, 701.0, 
701.2 


ASMEA112.18.3-2002* 


Performance Requirements for Backflow 
Protection Devices and Systems in Plumbing 
Fixtures Fittings 


Kitchen, Lavatory, 
Shampoo Bowls, 
and Shower 
Fittings with 
Flexible Hose 


603.3.10, 
603.4.21 


ASME A112.18.6-2003* 


Flexible Water Connectors 


Piping 


604.4, 604.12, 
604.14 


ASME Al 12.18.7-1999 
(R2004)* 


Deck Mounted Bath /Shower Transfer Valves 
with Integral Backflow Protection 


Valves 


603.3.7, 
603.4.15 


ASMEA112.19.1M-1994 
(R2004)* 


Enameled Cast-iron Plumbing Fixtures 
(Supplement 1-1998) 


Fixtures 


401.1, 411.5, 
411.6,411.7, 
414.0 


ASMEA112.19.2-2003* 


Vitreous China Plumbing Fixtures and 
Hydraulic Fixtures Requirements for Water 
Closets and Urinals 


Fixtures 


401.1, 402.1, 

402.2, 402.3, 
410.0, 410.4 


ASMEA112.19.3-2000 
(R2004)* 


Stainless Steel Plumbing Fixtures (Designed for 
Residential Use) 


Fixtures 


401.1 


ASME A112.19.4M-1994 
(R2004)* 


Porcelain-Enameled Formed Steel Plumbing 
Fixtures (Supplement 1-1998) 


Fixtures 


401.1,411.5, 
411.6,411.7, 
414.0 


ASME A112.19.5 -2005* 


Trim for Water-Closet Bowls, Tanks, and 
Urinals 


Fixtures 


301.1.1 


ASMEA112.19.7-2006* 


Hydromassage Bathtub Appliances 


Fixtures 


401.1,414.0 


ASMEA112.19.8-2007* 


Suction Fittings for Use in Swimming Pools, 
Wading Pools, Spas and Hot Tubs 


Swimming Pools 
and Spas 


414.4 


ASMEA112.19.9M-1991 
(R2002)* 


Non-Vitreous Ceramic Plumbing Fixtures 


Fixtures 


401.1 


ASMEA112.19.10-2003* 


Dual Flush Devices for Water Closets 


Fixtures 


410.1 


ASMEA112.19.12-2006* 


Wall Mounted, Pedestal Mounted, Adjustable, 
Elevating, Tilting and Pivoting Lavatory, Sink, 
and Shampoo Bowl Carrier Systems and 
Drainage Waste Systems 


Fixtures 


401.1, 407.4 


ASMEA112.19.13-2001 
J (R2007)* 


Electrohydraulic Water Closets 


Fixtures 


401.1, 408.0 



240 



REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASME A112.19.14-2006* 


Six-Liter Water Closets Equipped with a Dual 
Flushing Device 


Fixtures 


401.1,410.1 


ASME A112.19.15-2005* 


Bathtub/ Whirlpool Bathtubs with Pressure 
Sealed Doors 


Fixtures 


411.6 


ASME A112.19.19-2006* 


Vitreous China Nonwater Urinals 


Fixtures 


401.1,402.3.1 


ASME A112.20.1-2004* 


Qualification of Installers of High Purity Piping 
Systems 


Certification 


1302.0 


ASME Al 12.20.2-2004* 


Qualification of Installers of Firestop Systems 
and Devices for Piping Systems 


Certification 


1503.1 


ASMEA112.21.3M-1985 

(R2007)* 


Hydrants for Utility and Maintenance Use (Note 1) 


Valves 


603.1 


ASMEA112.36.2M-1991 
(R2002)* 


Cleanouts (Note 1) 


DWV Components 


707.1 


ASME Bl.20.1-1983 
(R2006)* 


Pipe Threads, General Purpose, Inch 


Joints 


316.1.1, 
1209.5.7(A) 


ASME Bl.20.3-1976 
(R2003)* 


Dryseal Pipe Threads, Inch 


Joints 


316.1.1 


ASME B16.1-2005* 


Gray-Iron Pipe Flanges and Flanged Fittings 
(Classes 25, 125, 250) 


Fittings 


604.1, 604.5, 
606.1.2, 
1209.5.8.4(5), 
1209.5.10 


ASME B16.3-2006* 


Malleable-Iron Threaded Fittings Classes 150 
and 300 


Fittings 


311.8,604.1, 
604.6, 
Table 6-4 
Table 7-1, 
701.2, 701.2.1, 
701.2.2, 
1209.5.8.4(2) 


ASME B16.4-1998 
(R2006)* 


Gray Iron Threaded Fittings, Classes 125 and 
250 (Includes Revision Services) 


Fittings 


311.8,604.1, 
Table 6-4, 
604.5, 
1209.5.8.4(2) 


ASME B16.5-2003* 


Pipe Flanges and Flanged Fittings: NPS 1/2 
through 24 Metric /Inch 


Fittings 


1209.5.10 


ASME B16.12-1998 
(R2006)* 


Cast Iron Threaded Drainage Fittings (Note 1) 


Fittings 


311.8, Table 
7-1, 701.2 


ASMEB16.15-2006* 


Cast Copper Alloy Threaded Fittings: Classes 
125 and 250 


Fittings 


311.8,316.2.1, 
Table 6-4, 
604.1 


ASME B16.18-2001 
(R2005)* 


Cast Copper Alloy Solder Joint Pressure Fittings 
(Note 1) 


Fittings 


316.1.3, 
Table 6-4, 
604.1 


ASMEB16.20-1998 
(R2004)* 


Metallic Gaskets For Pipe Flanges: Ring Joint 
Spiral Wound And Jacketed 


Joints 


1209.5.10 


ASME B16.21-2005* 


Nonmetallic Flat Gaskets for Pipe Flanges 


Joints 


1209.5.11 


ASME B16.22-2001 
(R2005)* 


Wrought Copper and Copper Alloy Solder Joint 
Pressure Fittings Alloy 


Fittings 


316.1.3, 
Table 6-4, 
604.1, 606.2.1 



241 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASME B16.23-2002 
(R2006)* 


Cast Copper Alloy Solder Joint Drainage 
Fittings - DWV 


Fittings 


316.1.3, 
Table 74, 
701.2,701.2.3 


ASME B16.24-2006* 


Cast Copper Alloy Pipe Flanges and Flanged 
Fittings: Classes 150, 300, 400, 600, 900, 1,500 
and 2,500 


Fittings 


604.1, 

1209.5.8.4, 

1209.5.10 


ASME B16.26-2006* 


Cast Copper Alloy Fittings for Flared Copper 
Tubes 


Fittings 


316.1.4, Table 
6-4, 604.1, 
606.1.1 


ASME B16.29-2007* 


Wrought Copper and Wrought Copper Alloy 
Solder Joint Drainage Fittings-DWV (Note 1) 


Fittings 


316.1.3, 
Table 7-1, 
701.2,701.2.3 


ASME B16.33-2002 
(R2007)* 


Manually Operated Metallic Gas Valves for Use 
in Gas Piping Systems up to 125 psi (Sizes NPS 
1/2-NPS24) 


Valves 


1211.10, 
1211.11 


ASME B16.34-2004* 


Valves - Flanged, Threaded, and Welding End 


Valves 


301.0 


ASME B16.39-1998 
(R2006)* 


Malleable Iron Threaded Pipe Unions (Classes 
150, 250 and 300) (Includes Revision Services) 


Fittings 


301.0 


ASME B16.40- 2002* 


Manually Operated Thermoplastic Gas Shutoff 
and Valves in Gas Distribution Systems 


Valves 


1211.11, 

1212.5 


ASME B16.47-2006* 


Large Diameter Steel Flanges: NPS 26 through 
NPS 60 Metric /Inch Standard 


Fittings 


301.0 


ASMEB16.50-2001* 


Wrought Copper and Copper Alloy Braze-Joint 
Pressure Fittings 


Fittings 


301.0 


ASME B31. 1-2007* 


Power Piping 


Piping 


301.0 


ASME B36.10M-2004* 


Welded and Seamless Wrought Steel Pipe 


Piping, Ferrous 


1209.5.2.2 


ASME B36.19M-2004* 


Stainless Steel Pipe 


Piping, Ferrous 


301.0 


ASME Section IV 


Rules for Construction of Heating Boilers 


Miscellaneous 


301.0 


ASME Section VIII 


Rules for Construction of Pressure Vessels 


Miscellaneous 


1325.6(2), 
1326.3 


ASME Section IX 


Welding and Brazing Qualifications 


Certification 


316.1.7, 
1311.6 


ASSE 1001-2008* 


Atmospheric-Type Vacuum Breakers 


Backflow Protection 


Table 6-2, 

603.1, 603.2.2, 

603.4.1, 

603.4.6.1, 

603.4.6.3, 

603.4.7, 

603.4.9, 

603.4.18 


ASSE 1002-1999 


Anti-Siphon Fill Valves (Ballcocks) for Gravity 
Water Closet Flush Tank 


Backflow Protection 


Table 6-2, 
603.1, 603.4.2 


ASSE 1003-2001* 


Water Pressure Reducing Valves 


Valves 


608.2 


ASSE 1004-1990* 


Backflow Prevention Requirements for 
Commercial Dishwashing Machines 


Backflow Protection 


603.2.1, 
603.3.6, 
603.3.7 


ASSE 1006-1986* 


Residential Use Dishwashers 


Appliances 


603.2.1, 
603.3.7, 807.4 



242 



REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASSE 1007-1986* 


Home Laundry Equipment 


Appliances 


603.2.1, 
603.3.7 


ASSE 1008-2006* 


Plumbing Aspects of Residential Food Waste 
Disposer Units 


Appliances 


603.2.1, 
603.3.7, 807.4 


ASSE 1009-1990* 


Commercial Food Waste Grinder Units 


Appliances 


603.2.1, 
603.3.7 


ASSE 1010-2004* 


Water Hammer Arresters 


Miscellaneous, 
Water Supply 
Component 


609.10, 
609.10.1 


ASSE 1011-2004* 


Hose Connection Vacuum Breakers 


Backflow Protection 


603.1, 603.4.7 


ASSE 1012-2002* 


Backflow Preventer with Intermediate 
Atmospheric Vent 


Backflow Protection 


603.1 


ASSE 1013-2005* 


Reduced Pressure Principle Backflow 
Preventers and Reduced Pressure Fire 
Protection Principle Backflow Preventers 


Backflow Protection 


Table 6-2, 

603.1, 603.2.7, 

603.4.6, 

603.4.6.2, 

603.4.6.3, 

603.4.6.4, 

603.4.16.2, 

603.4.16.3, 

603.4.18, 

603.4.20 


ASSE 1014-2005* 


Backflow Prevention Devices for Hand-Held 
Showers 


Backflow Protection 


603.3.10 


ASSE 1015-2005* 


Double Check Backflow Prevention Assemblies 
and Double Check Fire Protection Backflow 
Prevention Assemblies 


Backflow Protection 


Table 6-2, 
603.1, 603.2.4, 
603.4.8, 
603.4.16.1 


ASSE 1016-2005* 


Automatic Compensating Valves for Individual 
Showers and Tub /Shower Combinations 


Valves 


418.0 


ASSE 1017-2003* 


Temperature Actuated Mixing Valves for Hot 
Water Distribution Systems 


Valves 


301.1.3 


ASSE 1018-2001* 


Trap Seal Primer Valves-Potable Water 
Supplied 


Valves 


1007.0 


ASSE 1019-2004* 


Vacuum Breaker Wall Hydrant, Freeze- 
Resistant Automatic Draining Type 


Backflow Protection 


Table 6-2, 
603.4.7 


ASSE 1020-2004* 


Pressure Vacuum Breaker Assembly 


Backflow Protection 


Table 6-2, 

603.2.5, 

603.4.5, 

603.4.6, 

603.4.6.3, 

603.4.8 


ASSE 1021-2001 ■ 


Drains Air Gaps for Domestic Dishwasher 
Applications 


Backflow Protection 


807.4 


ASSE 1022-2003* 


Backflow Preventer for Beverage Dispensing 
Equipment 


Backflow Protection 


Table 6-2, 
603.4.12 


ASSE 1023-1979 


Hot Water Dispensers, Household Storage 
Type-Electrical 


Appliances 


401.1 


ASSE 1024-2004* 


Dual Check Valve Backflow Preventers 


Backflow Protection 


603.1 


ASSE 1032-2004 


Dual Check Valve Type Backflow Preventers for 
Carbonated Beverage Dispensers-Post Mix Types 


Backflow Protection 


603.1 



243 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASSE 1035-2002* 


Laboratory Faucet Backflow Preventers 


Backflow Protection 


603.1 


ASSE 1037-1990 


Pressurized Flushing Devices (Flushometers) 
for Plumbing Fixtures 


Backflow Protection 


603.4.1 


ASSE 1044-2001* 


Trap Seal Primer Devices-Drainage Types and 
Electronic Design Types 


DWV Components 


1007.0 


ASSE 1047-2005* 


Reduced Pressure Detector Fire Protection 
Backflow Prevention Assemblies 


Backflow Protection 


Table 6-2, 

603.4.16.1, 

603.4.16.2, 

603.4.16.3, 

603.4.18, 

603.4.20 


ASSE 1048-2005* 


Double Check Detector Fire Protection 
Backflow Prevention Assemblies 


Backflow Protection 


Table 6-2, 
603.4.16.1 


ASSE 1052-2004* 


Hose Connection Backflow Preventers 


Backflow Protection 


603.4.7 


ASSE 1055-1997 


Chemical Dispensing Systems 


Backflow Protection 


603.4.18 


ASSE 1056-2001* 


Spill Resistant Vacuum Breakers 


Backflow Protection 


Table 6-2, 

603.2.6, 

603.4.6.1, 

603.4.6.3, 

603.4.18 


ASSE 1060-2006* 


Outdoor Enclosures for Backflow Prevention 
Assemblies 


Miscellaneous 


603.3.8 


ASSE 1061-2006* 


Removable and Non-Removable Push-Fit 
Fittings 


Fittings 


316.1.10 


ASSE 1062-2006* 


Temperature Actuated Flow Reduction (TAFR) 
Valves for Individual Fixture Fittings 


Valves 


603.1 


ASSE 1066-1997 


Individual Pressure Balancing In-Line Valves 
for Individual Fixture Fittings (Note 6) 


Valves 


603.1 


ASSE 1069-2005* 


Automatic Temperature Control Mixing Valves 


Valves 


418.0 


ASSE 1070-2004* 


Water Temperature Limiting Devices 


Valves 


413.1, 414.5, 
416.3 


ASSE 1079-2005 


Dielectric Pipe Unions 


Joints 


301.0 


ASSE Series 5000-2004* 


Professional Qualification Standard for 
Backflow Prevention Assemblies, Testers, 
Repairers, and Surveyors 


Certification 


603.1, 603.3.3 


ASSE 6000-2006* 


Professional Qualifications Standard for 
Medical Gas Systems, Personnel 


Certification 


1302.2, 
1328.1.1 


ASTM A 47-1999 (R2004) 


Ferritic Malleable Iron Castings 


Piping, Ferrous 


301.0 


ASTM A 48-2003 


Gray Iron Castings 


Piping, Ferrous 


301.0 


ASTM A 53-2007 


Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, 
Welded, and Seamless 


Piping, Ferrous 


Table 6-4, 
604.1, 
Table 7-1, 
1209.5.2.2 



244 



REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASTM A 74-2006 


Cast Iron Soil Pipe and Fittings (Note 1) 


Piping, Ferrous 


Table 7-1, 

701.1,701.2, 

807.3, 903.1, 

1003.1, 

1101.3, 

1102.1.2, 

1102.2.2, 

1102.5.2 


ASTM A 126-2004 


Gray Iron Castings for Valves, Flanges, and 
Pipe Fittings 


Piping, Ferrous 


301.0 


ASTM A 197-2000 (R2006) 


Cupola Malleable Iron 


Piping/ Ferrous 


301.0 


ASTM A 269-2007a 


Seamless and Welded Austenitic Stainless Steel 
Tubing for General Service 


Piping, Ferrous 


301.0, 
Table 6-4, 
604.1 


ASTM A 312-2007 


Seamless, Welded and Heavy Cold Worked 
Austenitic Stainless Steel Pipes 


Piping, Ferrous 


Table 6-4, 
604.1 


ASTM A 377-2003 


Ductile-Iron Pressure Pipe 


Piping, Ferrous 


604.1 


ASTM A 479-2006a 


Stainless Steel Bars and Shapes for Use in 
Boilers and Other Pressure Vessels 


Piping, Ferrous 


301.0 


ASTM A 518-1999 (R2003) 


Corrosion-Resistant High-Silicon Iron Castings 


Piping, Ferrous 


301.0 


ASTM A 536-1984 (R2004) 


Ductile Iron Castings 


Piping, Ferrous 


301.0 


ASTM A 653-2007 


Steel Sheet, Zinc-Coated (Galvanized) or Zinc- 
Iron Alloy-Coated (Galvannealed) by the Hot- 
Dip Process 


Piping, Ferrous 


313.8, 510.6.1, 

510.6.2.5, 

906.5 


ASTM A 733-2003* 


Welded and Seamless Carbon Steel and 
Austenitic Stainless Steel Pipe Nipples 


Piping, Ferrous 


604.1 


ASTM A 861-2004 


High-Silicon Iron Pipe and Fittings (Note 1) 


Piping, Ferrous 


811.1,811.2 


ASTM A 888-2007a 


Hubless Cast Iron Soil Pipe and Fittings for 
Sanitary and Storm Drain Waste and Vent 
Piping Applications 


Piping, Ferrous 


Table 7-1, 
701.1,701.2, 
807.3, 903.1, 
1101.3, 
1102.1.2, 
1102.3, 1102.4 


ASTM B 29-2003* 


Refined Lead 


Joints 


313.8,316.1.2, 
401.2,411.8, 
701.3, 705.1.1, 
906.6, 1105.4 


ASTM B 32-2004 


Solder Metal (Note 2) 


Joints 


316.1.3, 1316.6 


ASTM B 42-2002 01 


Seamless Copper Pipe, Standard Sizes 


Piping, Copper 
Alloy 


Table 6-4, 
604.1, 
1102.1.2, 
1102.2.1 



245 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASTMB 43-1998 (R2004) 


Seamless Red Brass Pipe, Standard Sizes 


Piping, Copper 
Alloy 


Table 6-4, 

604.1, 

Table 7-1, 

701.1, 

1102.1.2, 

1102.2.1 


ASTM B 75-2002 


Seamless Copper Tube 


Piping, Copper 
Alloy 


Table 6-4, 

604.1, 

Table 7-1, 

701.1,701.1.4, 

1102.1.2, 

1102.2.1 


ASTM B 88-2003 


Seamless Copper Water Tube 


Piping, Copper 
Alloy 


Table 6-4, 
604.1, 903.2.4, 
1102.1.2, 
1102.2.1, 
1209.5.3.2, 
1316.3, 1325.3 


ASTM B 135-2002 


Seamless Brass Tube (Metric) 


Piping, Copper 
Alloy 


301.2, 
Table 6-4, 
604.1 


ASTM B 152-2006a 


Copper Sheet, Strip, Plate, and Rolled Bar 


Miscellaneous 


1102.2 


ASTM B 187-2006 


Copper Bar, Bus Bar, Rod and Shapes 


Miscellaneous 


301.0 


ASTM B 251-2002 cl 


General Requirements for Wrought Seamless 
Copper and Copper-Alloy Tube 


Piping, Copper 
Alloy 


Table 6-4, 

604.1, 

Table 7-1, 

701.1, 

1102.1.2, 

1102.2.1 


ASTM B 280-2003 


Seamless Copper Tube for Air Conditioning 
and Refrigeration Field Service 


Piping, Copper 
Alloy 


1209.5.3.2, 
1316.3, 1325.3 


ASTM B 302-2007 


Threadless Copper Pipe, Standard Sizes 


Piping, Copper 
Alloy 


Table 6-4, 
604.1, 
Table 7-1, 
701.1 


ASTM B 306-2002 


Copper Drainage Tube (DWV) 


Piping, Copper 
Alloy 


Table 7-1, 
701.1, 903.2.4 


ASTM B 370-2003 


Copper Sheet and Strip for Building Construction 


Miscellaneous 


1102.2.1 


ASTM B 447-2007 


Welded Copper Tube 


Piping, Copper 
Alloy 


301.0, 
Table 6-4, 
604.1 


ASTM B 584-2006a 


Copper Alloy Sand Casting for General 
Applications (Note 3) 


Piping, Copper 
Alloy 


701.4.1, 
701.4.2, 
1209.5.8.4 


ASTM B 587-2006 


Welded Brass Tube 


Piping, Copper 
Alloy 


604.1 


ASTM B 687-1999 
(R2005) c1 


Brass, Copper, and Chromium-Plated Pipe 
Nipples 


Piping, Copper 
Alloy 


604.1 



246 



REFERENCED STANDARDS 



Table 144 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASTM B 813-2000 cl 


Liquid and Paste Fluxes for Soldering 
Applications of Copper and Copper Alloy Tube 


Joints 


316.1.3 


ASTM B 819-2000 (R2006) 


Seamless Copper Tube for Medical Gas Systems 


Piping, Copper 
Alloy 


1316.3, 1325.3 


ASTM B 828-2002 


Making Capillary Joints by Soldering of Copper 
and Copper Alloy Tube and Fittings 


Joints 


316.1.3, 
1316.6 


ASTM C 14-2007 


Nonreinforced Concrete Sewer, Storm Drain, 
and Culvert Pipe 


Piping, Non- 
Metallic 


Table 74, 
701.1, 1102.3 


ASTM C 296-2000 
(R2004) cl 


Asbestos-Cement Pressure Pipe 


Piping, Non- 
Metallic 


Table 6-4, 
604.1 


ASTM C 412-2005a 


Concrete Drain Tile 


Piping, Non- 
Metallic 


1101.5.1 


ASTM C 425-2004 


Compression Joints for Vitrified Clay Pipe and 
Fittings 


Joints 


705.2.1 


ASTM C 428-2005 (R2006) 


Asbestos-Cement Nonpressure Sewer Pipe 
(Notes 4 and 5) 


Piping, Non- 
Metallic 


Table 7-1, 
701.1, 705.1.4, 
715.0, 1102.4 


ASTM C 443-2005a 


Joints for Concrete Pipe and Manholes, Using 
Rubber Gaskets 


Joints 


705.1.6 


ASTM C 478-2007 


Precast Reinforced Concrete Manhole Sections 


Miscellaneous 


719.6 


ASTM C 564»2003a 


Rubber Gaskets for Cast-Iron Soil Pipe and 
Fittings 


Joints 


705.1.7 


ASTM C 700-2007a 


Vitrified Clay Pipe, Extra Strength, Standard 
Strength, and Perforated 


Piping, Non- 
Metallic 


Table 7-1, 

701.1,701.2, 

1102.5.2 


ASTM C 1053-2000 
(R2005) 


Borosilicate Glass Pipe and Fittings for Drain, 
Waste, and Vent (DWV) Applications (Note 1) 


Piping, Non- 
Metallic 


811.2 


ASTM C 1173-2006 


Flexible Transition Couplings for Underground 
Piping Systems 


Joints 


705.1.4, 
705.1.6 


ASTM C 1277-2006 


Shielded Couplings Joining Hubless Cast Iron 
Soil Pipe and Fittings 


Joints 


705.1.8, 
705.1.9 


ASTM C 1440-2007 


Thermoplastic Elastomeric (TPE) Gasket 
Materials for Drain, Waste, and Vent (DWV), 
Sewer, Sanitary and Storm Plumbing Systems 


Joints 


705.1.4, 
705.1.6 


ASTM C 1460-2004 


Shielded Transition Couplings for Use with 
Dissimilar DWV Pipe and Fittings Above 
Ground 


Joints 


705.1.8, 
705.1.9 


ASTM C 1461-2007 


Mechanical Couplings Using Thermoplastic 
Elastomeric (TPE) Gaskets for Joining Drain, 
Waste, and Vent (DWV); Sewer; Sanitary; and 
Storm Plumbing Systems for Above and Below 
Ground Use 


Joints 


705.1.4, 
705.1.6, 
705.1.7, 
705.1.8, 
705.1.9 


ASTM C 1540-2004 


Heavy Duty Shielded Couplings Joining 
Hubless Cast Iron Soil Pipe and Fittings 


Joints 


705.1.8, 
705.1.9 


ASTM D 1527-1999 
(R2005)* 


Acrylonitrile-Butadiene-Styrene (ABS) Plastic 
Pipe, Schedule 40 and 80 


Piping, Plastic 


Table 7-1, 
701.1, 1102.1, 
1102.2.1 



247 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASTMD 1784-2007 


Rigid Poly (Vinyl Chloride) (PVC) Compounds 
and Chlorinated Poly (Vinyl Chloride) (CPVC) 
Compounds 


Miscellaneous 


301.0 


ASTM D 1785-2006* 


Poly (Vinyl Chloride) (PVC) Plastic Pipe, 
Schedules 40, 80, and 120 


Piping, Plastic 


Table 3-2, 
Table 6-4, 
604.1, 
Table 7-1, 
701.1, 903.1, 
1101.3, 1102.1, 
1102.2.1 


ASTM D 1869-1995 
(R2005) cl 


Rubber O-rings for Asbestos-Cement Pipe 


Joints 


705.1.4 


ASTMD 2104-2003* 


Polyethylene (PE) Plastic Pipe, Schedule 40 


Piping, Plastic 


604.1 


ASTM D 2235-2004* 


Solvent Cement for Acrylonitrile- Butadiene- 
Styrene (ABS) Plastic Pipe and Fittings 


Joints 


316.1.6 


ASTM D 2239-2003* 


Polyethylene (PE) Plastic Pipe, (SDR-PR) Based 
on Controlled Inside Diameter 


Piping, Plastic 


Table 6-4, 
604.1 


ASTM D 2241-2005" 


Polyvinyl Chloride) (PVC) Pressure- Rated 
Pipe (SDR Series) 


Piping, Plastic 


Table 6-4, 
604.1 


ASTMD 2321-2005* 


Underground Installation of Thermoplastic 
Pipe for Sewers and Other Gravity-Flow 
Applications 


Piping, Plastic 


701.1 


ASTM D 2447-2003* 


Polyethylene (PE) Plastic Pipe, Schedule 40 and 
80, Based on Outside Diameter 


Piping, Plastic 


604.1 


ASTM D 2464-2006* 


Threaded Polyvinyl Chloride) (PVC) Plastic 
Pipe Fittings, Schedule 80 (Note 1) 


Fittings 


Table 6-4, 
604.1 


ASTM D 2466-2006* 


Polyvinyl Chloride) (PVC) Plastic Pipe 
Fittings, Schedule 40 (Note 1) 


Fittings 


Table 6-4, 
604.1 


ASTM D 2467-2006* 


Polyvinyl Chloride) (PVC) Plastic Pipe 
Fittings, Schedule 80 (Note 1) 


Fittings 


Table 6-4, 
604.1 


ASTM D 2513-2007b* 


Thermoplastic Gas Pressure Pipe Tubing and 
Fittings (Note 1) 


Piping, Plastic 


1209.5.4, 
1209.5.4.2, 
1209.5.9(B), 
1211.1.7(B) 


ASTMD 2517-2006* 


Reinforced Epoxy Resin Gas Pressure Pipe and 
Fittings 


Piping, Plastic 


301.0 


ASTMD2564-2004 cl * 


Solvent Cements for Poly (Vinyl Chloride) 
(PVC) Plastic Piping Systems 


Joints 


316.1.6 


ASTM D 2609-2002* 


Plastic Insert Fittings for Polyethylene (PE) 
Plastic Pipe (Note 1) 


Joints 


Table 6-4, 
604.1 


ASTM D 2657-2007* 


Heat Fusion Joining of Polyolefin Pipe Fittings 
(Note 1) 


Joints 


301.0 


ASTM D 2661-2006* 


Acrylonitrile-Butadiene-Styrene (ABS) Schedule 
40 Plastic Drain, Waste, and Vent Pipe and 
Fittings (Note 1) 


Piping, Plastic 


Table 7-1, 
701.1,701.2, 
707.1, 903.1, 
1101.3, 1102.4 



248 



REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASTM D 2665-2008* 


Polyvinyl Chloride) (PVC) Plastic Drain, 
Waste, and Vent Pipe and Fittings 


Piping, Plastic 


Table 7-1, 
7014,701.2, 
7074, 903.1, 
1101.3, 11024 


ASTM D 26724996a 
(R2003)* 


Joints for IPS PVC Pipe Using Solvent Cement 


Joints 


3164.6 


ASTM D 2680-2001* 


Acrylonitrile-Butadiene-Styrene (ABS) and Poly 
(Vinyl Chloride) (PVC) Composite Sewer 
Piping 


Piping, Plastic 


Table 7-1, 
701.1, 11024 


ASTM D 2683-2004* 


Socket-Type Polyethylene Fittings for Outside 
Diameter-Controlled Polyethylene Pipe and 
Tubing 


Fittings 


Table 6-4, 
6044 


ASTM D 2729-2003* 


Poly(Vinyl Chloride) (PVC) Sewer Pipe and 
Fittings (Note 1) 


Piping, Plastic 


1102.5, 16114 


ASTM D 2737-2003* 


Polyethylene (PE) Plastic Tubing 


Piping, Plastic 


Table 6-4, 
604.1 


ASTM D 2751-2005* 


Acrylonitrile-Butadiene-Styrene (ABS) Sewer 
Pipe and Fittings (Note 1) 


Piping, Plastic 


1102.5, 1611.0 


ASTM D 2774-2004 01 * 


Underground Installation of Thermoplastic 
Pressure Piping 


Piping, Plastic 


301.0 


ASTM D 2846-2006* 


Chlorinated Poly (Vinyl Chloride) (CPVC) 
Plastic Hot- and Cold- Water Distribution 
Systems 


Piping, Plastic 


Table 6-4, 
6044 


ASTM D 2855-1996 
(R2002)* 


Making Solvent-Cemented Joints with 
Polyvinyl Chloride) (PVC) Pipe and Fittings 


Joints 


3164.6 


ASTM D 2996-2001 
(R2007) eJ * 


Filament- Wound "Fiberglass" (Glass-Fiber- 
Reinforced Thermosetting Resin) Pipe 


Piping, Plastic 


301.0 


ASTM D 3034-2006* 


Type PSM Poly (Vinyl Chloride) (PVC) Sewer 
Pipe and Fittings 


Piping, Plastic 


301.0 


ASTM D 3035- 2006* 


Polyethylene (PE) Plastic Pipe (DR-PR) (Based 
on Controlled Outside Diameter) 


Piping, Plastic 


Table 6-4, 
6044, 1611.1 


ASTM D 3122-1995 
(R2002)* 


Solvent Cements for Styrene-Rubber (SR) 
Plastic Pipe and Fittings 


Joints 


301.0 


ASTM D 3138-2004* 


Solvent Cements for Transition Joints, 
Acrylonitrile-Butadiene- Styrene (ABS) and 
Poly (Vinyl Chloride) (PVC) Non-Pressure 
Piping Components 


Joints 


3164.6 


ASTM D 3139-1998 
(R2005)* 


Joints for Plastic Pressure Pipes Using Flexible 
Elastomeric Seals 


Joints 


3164.5 


ASTM D 32124996a 
(R2003) el * 


Joints for Drain and Sewer Plastic Pipes Using 
Flexible Elastomeric Seals 


Joints 


705.1.7 


ASTM D 3261-2003* 


Butt Heat Fusion Polyethylene (PE) Plastic 
Fitting for Polyethylene (PE) Plastic Pipe and 
Tubing 


Fittings 


Table 6-4, 
6044 


ASTM D 331 l-2006a* 


Drain, Waste, and Vent (DWV) Plastic Fittings 
Patterns (Note 1) 


Miscellaneous 


701.2 


ASTM D 3965-2005* 


Rigid Acrylonitrile-Butadiene-Styrene (ABS) 
Materials for Pipe and Fittings 


Miscellaneous 


701.1; 701.2, 
903.1 



249 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASTMD 4068-2001* 


Chlorinated Polyethylene (CPE) Sheeting for 
Concealed Water-Containment Membrane 


Fixtures 


411.8 


ASTM D 4101-2007* 


Polypropylene Injection and Extrusion 
Materials 


Miscellaneous 


811.1 


ASTMD 4551-1996 
(R2001)* 


Polyvinyl Chloride) (PVC) Plastic Flexible 
Concealed Water-Containment Membrane 


Fixtures 


411.5 


ASTM D 6104-1997 
(R2003) 


Determining the Performance of Oil / Water 
Separators Subjected to Surface Run-Off 


Fixtures 


1009.1, 1017.1 


ASTM E 84-2007b 


Surface Burning Characteristics of Building 
Materials 


Miscellaneous 


701.1.2, 
903.1.2, 
1101.3 


ASTM E 119-2007a 


Fire Tests of Building Construction and Materials 


Miscellaneous 


1505.3, 1506.3 


ASTM E 814-2006* 


Fire Tests of Through-Penetration Fire Stops 


Miscellaneous 


313.7, 
313.10.4, 
508.15.2, 
1504.2, 1504.3, 
1505.3, 1506.3 


ASTM F 402-2005* 


Safe Handling of Solvent Cements, Primers, and 
Cleaners Used for Joining Thermoplastic Pipe 
and Fittings 


Joints 


316.1.6 


ASTM F 405-2005* 


Corrugated Polyethylene (PE) Pipe and Fittings 


Piping, Plastic 


301.0 


ASTM F 409-2002* 


Thermoplastic Accessible and Replaceable 
Plastic Tube and Tubular Fittings (Note 1) 


Piping, Plastic 


1003.0 


ASTM F 437-2006* 


Threaded Chlorinated Poly(Vinyl Chloride) 
(CPVC) Plastic Pipe Fittings, Schedule 80 


Fittings 


Table 6-4, 
604.1 


ASTM F 438-2004* 


Socket-Type Chlorinated Poly (Vinyl Chloride) 
(CPVC) Plastic Pipe Fittings, Schedule 40 


Fittings 


Table 6-4, 
604.1 


ASTM F 439-2006* 


Chlorinated Poly (Vinyl Chloride) (CPVC) 
Plastic Pipe Fittings, Schedule 80 


Fittings 


Table 6-4, 
604.1 


ASTM F 441-2002* 


Chlorinated Poly (Vinyl Chloride) (CPVC) 
Plastic Pipe, Schedule 40 and 80 


Piping, Plastic 


Table 6-4, 
604.1 


ASTM F 442-1999 
(R2005)* 


Chlorinated Poly (Vinyl Chloride) (CPVC) 
Plastic Pipe (SDR-PR) 


Piping, Plastic 


Table 6-4, 
604.1 


ASTM F 446-1985 
(R2004) 03 


Grab Bars and Accessories Installed in the 
Bathing Area 


Miscellaneous 


301.0 


ASTM F 480-2006b* 


Thermoplastic Well Casing Pipe and Couplings 
Made in Standard Dimension Ratios (SDR) 
Schedule 40 and Schedule 80 


Piping, Plastic 


604.1 


ASTM F 493-2004* 


Solvent Cements for Chlorinated Poly (Vinyl 
Chloride) (CPVC) Plastic Pipe and Fittings 


Joints 


316.1.6 


ASTM F 628-2006 01 * 


Acrylonitrile-Butadiene-Styrene (ABS) Schedule 
40 Plastic Drain, Waste, and Vent Pipe with a 
Cellular Core, (Note 1) 


Piping, Plastic 


Table 7-1, 
701.1, 701.2, 
903.1,1101.3 


ASTM F 656-2002* 


Primers for Use in Solvent Cement Joints of Poly 
(Vinyl Chloride) (PVC) Plastic Pipe and Fittings 


Joints 


316.1.6 


ASTM F 667-2006* 


Large Diameter Corrugated Polyethylene Pipe 
and Fittings 


Piping, Plastic 


301.0 



250 



REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASTM F 714-2006a* 


Polyethylene (PE) Plastic Pipe (SDR-PR) (Based 
on Outside Diameter) 


Piping, Plastic 


715.0 


ASTM F 794-2003* 


Poly (Vinyl Chloride) (PVC) Profile Gravity 
Sewer Pipe and Fittings Based on Controlled 
Inside Diameter 


Piping, Plastic 


Table 7-1, 
701.1,701.2, 
715.0, 1102.4 


ASTM F 810-2007* 


Smoothwall Polyethylene (PE) Pipe for Use in 
Drainage and Waste Disposal Absorption Fields 


Piping, Plastic 


1611.0 


ASTM F 876-2006* 


Crosslinked Polyethylene (PEX) Tubing 


Piping, Plastic 


Table 6-4, 
604.1,604.11 


ASTM F 877-2005* 


Crosslinked Polyethylene (PEX) Plastic Hot- 
and Cold-Water Distribution Systems 


Piping, Plastic 


Table 6-4, 
604.1,604.11 


ASTM F 891-2007* 


Coextruded Poly (Vinyl Chloride) (PVC) Plastic 
Pipe with a Cellular Core 


Piping, Plastic 


Table 7-1, 
701.1, 903.1, 
1101.3 


ASTM F 894-2007* 


Polyethylene (PE) Large Diameter Profile Wall 
Sewer and Drain Pipe 


Piping, Plastic 


301.0 


ASTM F 949~2006a* 


Poly (Vinyl Chloride) (PVC) Corrugated Sewer 
Pipe with a Smooth Interior and Fittings 


Piping, Plastic 


301.0 


ASTM F 1055-1998 
(R2006)* 


Electrofusion Type Polyethylene Fittings for 
Outside Diameter Controlled Polyethylene Pipe 
and Tubing 


Fittings 


301.2, 
Table 6-4, 
604.1 


ASTM F 1216-2007b* 


Rehabilitation of Existing Pipelines and 
Conduits by the Inversion and Curing of a 
Resin-Impregnated Tube 


Piping, Plastic 


715.3 


ASTM F 1281-2007* 


Crosslinked Polyethylene / Aluminum / 
Crosslinked Polyethylene (PEX-AL-PEX) 
Pressure Pipe 


Piping, Plastic 


Table 6-4, 
604.1, 604.13 


ASTM F 1282-2006* 


Polyethylene / Aluminum / Polyethylene (PE- 
AL-PE) Composite Pressure Pipe 


Piping, Plastic 


Table 6-4, 
604.1, 604.13 


ASTM F 1335-2004* 


Pressure-Rated Composite Pipe and Fittings for 
Elevated Temperature Service 


Piping, Plastic 


301.0 


ASTM F 1336-2007* 


Poly (Vinyl Chloride) (PVC) Gasketed Sewer 
Fittings 


Fittings 


301.0 


ASTM F 1412-2001 cl * 


Polyolefin Pipe and Fittings for Corrosive 
Waste Drainage Systems 


Piping, Plastic 


811.2 


ASTM F 1476-2007* 


Performance of Gasketed Mechanical Couplings 
for Use in Piping Application 


Joints 


705.1.7 


ASTM F 1488-2003* 


Coextruded Composite Pipe 


Piping, Plastic 


Table 7-1, 
701.1 


ASTM F 1499-2001* 


Coexrude Composite Drain, Waste, and Vent 
Pipe (DWV) 


Piping, Plastic 


301.0 


ASTM F 1673-2004* 


Polyvinylidene Fluoride (PVDF) Corrosive 
Waste Drainage Systems 


Piping, Plastic 


811.2 


ASTM F 1743-1996 
(R2003)* 


Rehabilitation of Existing Pipelines and 
Conduits by Pulled-in-Place Installation of 
Cured-in-Place Thermosetting Resin Pipe (CIPP) 


Piping, Plastic 


715.3 



251 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASTMF1807-2007a cl * 


Metal Insert Fittings Utilizing Copper Crimp 
Ring for SDR9 Cross-linked Polyethylene (PEX) 
Tubing 


Joints 


Table 6-4, 

604.1, 

604.11.1 


ASTMF 1866-2007* 


Poly (Vinyl Chloride) (PVC) Plastic Schedule 40 
Drainage and DWV Fabricated Fittings 


Piping, Plastic 


Table 7-1, 
701.1, 701.2, 
903.1, 1101.3 


ASTMF 1924-2005* 


Plastic Mechanical Fitting for Use on Outside 
Diameter Controlled Polyethylene Gas 
Distribution Pipe and Tubing 


Fittings 


301.0 


ASTMF 1948-2005* 


Metallic Mechanical Fittings for Use on Outside 
Diameter Controlled Thermoplastic Gas 
Distribution Pipe and Tubing 


Fittings 


301.0 


ASTM F 1960-2007a* 


Cold Expansion Fittings with PEX Reinforcing 
Rings for Use with Cross-linked Polyethylene 
(PEX) Tubing 


Fittings 


Table 6-4, 

604.1, 

604.11.1 


ASTMF 1961-2002a* 


Metal Mechanical Cold Flare Compression 
Fittings with Disc Springs for Cross-linked 
Polyethylene (PEX) Tubing 


Fittings 


Table 6-4, 

604.1, 

604.11.1 


ASTMF 1970-2005* 


Special Engineered Fittings or Appurtenances 
or Valves for Use in Poly (Vinyl Chloride) 
(PVC) or Chlorinated Poly (Vinyl Chloride) 
(CPVC) Systems 


Miscellaneous 


Table 6-4, 
604.1 


ASTM F 1973-2005* 


Factory Assembled Anodeless Riser and Tran- 
sition Fitting in Polyethylene (PE) and Polymide 
11 (PAH) Fuel Gas Distribution Systems 


Fuel Gas 


1209.5.4, 
1211.1.7(B) 


ASTM F 1974-2004* 


Metal Insert Fittings for Polyethylene/ 
Aluminum /Polyethylene and Crosslinked 
Polyethylene / Aluminum / Crosslinked 
Polyethylene Composite Pressure Pipe 


Joints 


Table 6-4, 

604.1, 

604.13.1 


ASTMF 1986-2001 
(R2006)* 


Multilayer Pipe Type 2, Compression Fittings, 
and Compression Joints for Hot and Cold 
Drinking-Water Systems 


Fittings 


301.0 


ASTM F 2080-2005 


Cold-Expansion Fittings With Metal 
Compression-Sleeves for Cross-Linked 
Polyethylene (PEX) Pipe 


Fittings 


Table 6-4, 

604.1, 

604.11.1 


ASTM F 2098-2004° r 


Stainless Steel Clamps for Securing SDR9 Cross- 
linked Polyethylene (PEX) Tubing to Metal 
Insert Fittings 


Joints 


604.11.1 


ASTM F 2159-2005* 


Plastic Insert Fittings Utilizing a Copper Ring for 
SDR9 Cross-linked Polyethylene (PEX) Tubing 


Joints 


Table 6-4, 

604.1, 

604.11.1 


ASTM F 2165-2002* 


Flexible Pre-Insulated Piping 


Piping, Plastic 


301.0 


ASTM F 2262-2005* 


Crosslinked 

Polyethylene / Aluminum / Crosslinked 

Polyethylene Tubing OD Controlled SDR9 


Piping, Plastic 


Table 6-4, 
604.1, 604.13 


ASTM F 2434-2005* 


Metal Insert Fittings Utilizing a Copper Crimp 
Ring for SDR9 Cross-linked Polyethylene (PEX) 
Tubing and SDR9 Crosslinked 
Polyethylene / Aluminum / Cross-linked 
Polyethylene (PEX-AL-PEX) Tubing 


Joints 


Table 6-4, 

604.1, 

604.13.1 



252 



REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


ASTM F 2509-2006* 


Field -Assembled Anodeless Riser Kits for Use 
on Outside Diameter Controlled Polyethylene 
Gas Distribution Pipe and Tubing 


Fuel Gas 


1209.5.4, 
1211.1.7(B) 


AWS A5.8-2004* 


Specification for Filler Metals for Brazing and 
Braze Welding 


Joints 


1319.1 


AWS B2.2-1991 


Brazing Procedure and Performance 
Qualification 


Certification 


316.1.7, 
1311.6 


AWS B2.4-2006* 


Welding Procedure and Performance 
Qualification for Thermoplastics 


Joints, 
Certification 


316.1.7, 
1209.5.9(B) 


AWWA CI 10-2003* 


Ductile-Iron and Gray-Iron Fittings for Water 
(same as ANSI A 21.10) 


Fittings 


Table 6-4, 
604.1 


AWWAC111-2007* 


Rubber-Gasket Joints for Ductile-Iron Pressure 
Pipe and Fittings (same as ANSI A 21.11) 


Joints 


606.1.2 


AWWA C151-2002* 


Ductile-Iron Pipe, Centrifugally Cast, for Water 


Piping, Ferrous 


Table 6-4, 
604.1 


AWWA C153-2006* 


Ductile-Iron Compact Fittings for Water Service 


Fittings 


Table 6-4, 
604.1 


AWWA C203-2002* 


Coal-Tar Protective Coatings and Linings for 
Steel Water Pipelines Enameled and Tape - Hot 
Applied 


Miscellaneous 


609.3.1 


AWWA C213-2001* 


Fusion-Bonded Epoxy Coating for the Interior 
and Exterior of Steel Water Pipelines 


Miscellaneous 


609.3.1 


AWWA C215-2004* 


Extruded Polyolefin Coatings for the Exterior of 
Steel Water Pipelines 


Miscellaneous 


609.3.1 


AWWA C400-2003* 


Asbestos-Cement Pressure Pipe, 4 in. through 
16 in. (100 mm through 400 mm) for Water 
Distribution and Transmission 


Piping, Non- 
Metallic 


Table 6-4, 
604.1 


AWWA C500-2002* 


Metal-Seated Service Gate Valves for Water 
Supply Service 


Valves 


605.1 


AWWA C504-2006* 


Rubber-Seated Butterfly Valves 


Valves 


605.1 


AWWA C507-2005* 


Ball Valves, 6 in. through 48 in. (150 mm 
through 1,200 mm) 


Valves 


605.1 


AWWA C510-1997* 


Double Check Valve Backflow Prevention 
Assembly 


Backflow Protection 


Table 6-2, 
603.1, 603.2.4, 
603.4.8, 
603.4.16.1 


AWWAC511-1997* 


Reduced-Pressure Principle Backflow Prevention 
Assembly 


Backflow Protection 


Table 6-2, 

603.1, 603.2.7, 

603.4.6, 

603.4.6.2, 

603.4.6.3, 

603.4.6.4, 

603.4.16.2, 

603.4.16.3, 

603.4.18, 

603.4.20 


AWWA C606-2006* 


Grooved and Shouldered Joints 


Joints 


301.0 



253 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


AWWA C900-2007* 


Polyvinyl Chloride (PVC) Pressure Pipe, and 
Fabricated Fittings 4 in. through 12 in. (100 mm 
through 300 mm), for Water Distribution 


Piping, Plastic 


Table 6-4, 
604.1 


AWWA C901-2002* 


Polyethylene (PE) Pressure Pipe and Tubing, 
1 /2 in. (13 mm) through 3 in. (76 mm), for 
Water Service 


Piping, Plastic 


Table 6-4, 
604.1 


AWWA C904-2006* 


Cross-Linked Polyethylene (PEX) Pressure Pipe, 
1 /2 in. (12 mm) through 3 in. (76 mm), for 
Water Service 


Piping, Plastic 


301.0 


AWWA C907-2004* 


Injection-Molded Polyvinyl Chloride (PVC) 
Pressure Fittings, 4 in. through 12 in. (100 mm 
through 300 mm), for Water Distribution 


Fittings 


301.0 


CGA V-l 2005 


Compressed Gas Cylinder Valve Outlet and 
Inlet Connection 


Valves 


Chapter 13 


CG A S-l. 3-2005 


Pressure Relief Device Standards-Part 3- 
Stationary Storage Containers for Compressed 
Gases 


Fuel Gas 


301.0 


CISPI 301-2005 


Hubless Cast Iron Soil Pipe and Fittings for 
Sanitary and Storm Drain, Waste, and Vent 
Piping Applications (Note 1) 


Piping, Ferrous 


Table 7-1, 
701.1, 701.2, 
1101.3 


CISPI 310-2004 


Couplings for Use in Connection with Hubless 
Cast Iron Soil Pipe and Fittings for Sanitary and 
Storm Drain, Waste, and Vent Piping 
Applications 


Joints 


705.1.8, 
705.1.9, 
705.2.2 


CSA No. 3-1992 


U.S. Requirements for Excess Flow Valves 


Valves 


1210.0 


CSA A257-2003 


Concrete Pipe and Manhole Sections 


Piping 


301.0 


CSA B45.0-2002 


General Requirements for Plumbing Fixtures 


Fixtures 


401.1,402.1, 
402.2, 402.3, 
411.6,411.7, 
416.0 


CSA B45.1-2002 


Ceramic Plumbing Fixtures 


Fixtures 


401.1,402.1, 
402.2, 402.3, 
416.0 


CSAB45.2-2002 


Enameled Cast-iron Plumbing Fixtures 


Fixtures 


401.1,402.1 


CSA B45.3-2002 


Porcelain-Enamelled Steel Plumbing Fixtures 


Fixtures 


401.1,402.1, 
413.0, 414.0, 
416.0 


CSA B45.4-2002 


Stainless Steel Plumbing Fixtures 


Fixtures 


401.1,402.1, 
402.2, 402.3, 
411.6,411.7, 
414.0, 416.0 


CSA B45.5-2002 


Plastic Plumbing Fixtures 


Fixtures 


401.1,401.2, 
402.3, 414.0, 
416.0 


CSA B45.9-2002 


Macerating Systems and Related Components 


DWV Components 


710.13 


CSAB45.10-2001 (R2006) 


Hydromassage Bathtubs 


Fixtures 


414.0 


CSAB45.11-2004 


Glass Lavatories 


Fixtures 


401.1 



254 



REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


CSA B64-2007 


Backflow Preventers and Vacuum Breakers 


Backflow Protection 


Table 6-2, 
603.1, 603.2 


CSAB64.1.1-2007 


Atmospheric Vacuum Breakers (AVB) 


Backflow Protection 


Table 6-2, 
603.1, 603.2.2 


CSA B64.1. 2-2007 


Pressure Vacuum Breakers (PVB) 


Backflow Protection 


Table 6-2, 
603.1, 603.2.5 


CSA B64.2-2007 


Hose Connection Vacuum Breakers (HCVB) 


Backflow Protection 


Table 6-2, 
603.1, 603.2.3 


CSA B64.2.1. 1-2001 


Hose Connection Vacuum Breaker, Hose 


Backflow Protection 


Table 6-2, 


(R2006) 


Connection Dual Check Type (HCDVB) 




603.1, 603.2.3 


CSA B64.4-2007 


Reduced Pressure Principle (RP) Backflow 


Backflow Protection 


Table 6-2, 




Preventers 




603.1, 603.2.7, 

603.4.6, 

603.4.6.2, 

603.4.6.3, 

603.4.6.4, 

603.4.16.2, 

603.4.16.3, 

603.4.18, 

603.4.20 


CSA B64.4. 1-2001 (R2006) 


Reduced Pressure Principle Backflow 


Backflow Protection 


Table 6-2, 




Preventers for Fire Systems (RPF) * 




603.1, 603.2.7, 

603.4.6, 

603.4.6.2, 

603.4.6.3, 

603.4.6.4, 

603.4.16.2, 

603.4.16.3, 

603.4.18, 

603.4.20 


CSA B64.5-2001 (R2006) 


Double Check Valve (DVCA) Backflow 


Backflow Protection 


Table 6-2, 




Preventers 




603.1, 603.2.4, 

603.4.8, 

603.4.16.1 


CSAB64.5,1-2001(R2006) 


Double Check Valve Backflow Preventers for 


Backflow Protection 


Table 6-2, 




Fire Systems (DVCAF) . 




603.1, 603.2.4, 

603.4.8, 

603.4.16.1 


CSAB64.7-2001 


Vacuum Breakers, Laboratory Faucet Type 


Backflow Protection 


603.1, 




(LFVB) 




603.4.17 


CSA B79-2005 


Floor Drains, Area Drains, Shower Drains, and 
Cleanouts for Residential Construction 


DWV Components 


401.1 


CSA B125.3-2005 


Plumbing Fittings 


Valves 


413.1, 414.5, 
416.3, 
Table 6-2 



255 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


CSAB128.1-2006/B128.2- 
2006 


Design and Installation of Non-Potable Water 
Systems / Maintenance and Field Testing of 
Non-Potable Water Systems (Note 1) 


Miscellaneous 


301.0 


CSAB137.1-2005 


Polyethylene (PE) Pipe, Tubing, and Fittings for 
Cold Water Pressure Services 


Piping, Plastic 


Table 6-4, 
604.1 


CSA B137.5-2005 


Cross linked Polyethylene (PEX) Tubing 
Systems for Pressure Applications 


Piping, Plastic 


Table 6-4, 

604.1,604.11, 

604.11.1 


CSA B137.9-2005 


Polyethylene / Aluminum/ Polyethylene 
Composite Pressure-Pipe Systems 


Piping, Plastic 


Table 6-4, 
604.1, 604.13, 
604.13.1 


CSAB137.10-2005 


Cross linked Polyethylene /Aluminum /Cross 
linked Polyethylene Composite Pressure-Pipe 
Systems 


Piping, Plastic 


Table 6-4, 
604.1, 604.13, 
604.13.1 


CSA B181. 3-2006 


Polyolefin Laboratory Drainage Systems 


Piping, Plastic 


811.2 


CSA B242-2005 


Groove and Shoulder Type Mechanical Pipe 
Couplings 


Fittings 


301.0 


CSA B356-2000 (R2005) 


Water Pressure Reducing Valves for Domestic 
Water Supply Systems 


Valves 


608.2, 608.4 


CSA G401-2007 


Corrugated Steel Pipe Products 


Miscellaneous 


301.0 


CSA LC1-2005 


Fuel Gas Piping Systems Using Corrugated 
Stainless Steel Tubing (CSST) (same as CSA 6.26) 


Fuel Gas 


1209.5.3.4 


CSA LC3-2000* 


Appliance Stands and Drain Pans 


Miscellaneous 


508.4 


CSA LC4-2007 


Press-Connect Copper and Copper Alloy 
Fittings for Use in Fuel Gas Distribution 
Systems (same as CSA 6.32) 


Fuel Gas 


1209.5.8.2 


CSAZ21.5.1-2006* 


Gas Clothes Dryers -Volume I- Type 1 Clothes 
Dryers (same as CSA 7.1) 


Fuel Gas 


507.1.1.2, 
507.1.1.3 


CSA Z21.5.2a-2006* 


Gas Clothes Dryers -Volume 2- Type 2 Clothes 
Dryers (same as CSA 7.2) 


Fuel Gas 


507.1.1.3 


CSAZ21.10.1b-2006* 


Gas Water Heaters - Volume I - Storage Water 
Heaters with Input Ratings of 75,000 Btu per 
Hour or Less (same as CSA 4.1) 


Appliances 


501.0 


CSAZ21.10.3a-2007* 


Gas Water Heaters - Volume III, Storage, with 
Input Ratings Above 75,000 BTu per Hour, 
Circulating and Instantaneous (same as CSA 
4.3) 


Appliances 


501,0 


CSAZ21.12b-1994* 
(R2000) 


Draft Hoods 


Appliances 


510.12.1 


CSAZ21.13b-2007* 


Gas-Fired Low-Pressure Steam and Hot-Water 
Boilers 


Appliances 


501.0 


CSAZ21.15b-2006* 


Manually Operated Gas Valves for Appliances, 
Appliance Connector, Valves, and Hose End 
Valves (same as CSA 9.1) 


Valves 


1211.11, 
1212.5 


CSA Z21.22b-2001 
(R2003)* 


Relief Valves for Hot Water Supply Systems 
(same as CSA 4.4) 


Valves 


608.4, 608.7 



256 



REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


Referenced 
Sections 


CSAZ21. 24-2006* 


Connectors for Gas Appliances (same as CSA 
6.10) 


Appliances 


1212.2 


CSAZ21.40.1a-1997 
(R2002)* 


Quick Connect Devices for Use With Gas Fuel 
(same as CSA 2.91) 


Joints 


1212.6 


CSAZ21.41a-2005* 


Quick-Disconnect Devices for Use with Gas 
Fuel Appliances (same as CSA 6.9) 


Joints 


1212.6 


CSA Z21.47a-2007* 


Gas-Fired Central Furnaces (same as CSA 2.3) 


Fuel Gas 


501.0 


CSAZ21. 56-2006* 


Gas-Fired Pool Heaters (same as CSA 4.7) 


Swimming Pools 
and Spas 


USPSHTC 


CSA Z21.69b-2006* 


Connectors for Movable Gas Appliances (same 
as CSA 6.16) 


Appliances 


1212.4 


CSA Z21.80a-2005* 


Line Pressure Regulators (same as CSA 6.22) 


Fuel Gas 


1209.7.2, 
1209.7.5 (A,l) 


CSAZ21.81a-2007* 


Cylinder Connection Devices (same as CSA 
6.25) 


Fuel Gas 


1209.5 


CSA Z21.86b-2007* 


Vented Gas-Fired Space-Heating Appliances 
(same as CSA 2.32) 


Appliances 


501.0 


CSAZ83.11-2006* 


Gas Food Service Equipment (same as CSA 1.8) 


Fuel Gas 


501.0 


CSA Z317.1-1999 (R2002)* 


Special Requirements for Plumbing 
Installations in Health Care Facilities 


Miscellaneous 


1301.0 


FCI 74-1-1991 


Spring Loaded Lift Disc Check Valve 


Valves 


301.0 


IAPMO IGC 154-2006a 


Tub /Shower Enclosures with Factory-Installed 
Fittings, Shower Panel, Shower Door, and 
Threshold Assemblies 


Fixtures 


401.1 


IAPMO IGC 157-2007 


Ball Valves 


Valves 


301.0 


IAPMO IGC 172-2005 


Glass Lavatories and Sinks 


Fixtures 


401.1 


IAPMO IGC 193-2006 


Safety Plates and Plate Straps 


Miscellaneous 


301.0 


IAPMO IGC 194-2004a 


Copper Alloy or Aluminum Alloy Sinks and 
Lavatories 


Fixtures 


401.1 


IAPMO IGC 217-2007 


Metallic Bathtubs, Shower Pans, and Whirlpool 
Bathtubs 


Fixtures 


401.1 


IAPMO IGC 226-2006a 


Drinking Water Fountains With or Without 
Chiller or Heater 


Fixtures 


401.1 


IAPMO PS 23-2006a 


Dishwasher Drain Air Gaps 


Backflow Protection 


Table 6-2, 
603.1, 807.4 


IAPMO PS 25-2002 


Metallic Fittings for Joining Polyethylene Pipe 
for Water Service and Yard Piping 


Joints 


603.1